125876 + Interview Questions in General QA Page 293 InterviewSolution

14601.	State the major places where iron is available.
Answer» Iron producing states: Karnataka produces maximum amount of iron ore in India. Iron is also obtained from Odisha, Jharkhand, Chhattisgarh and Andhra Pradesh in good quantity. Iron ore is also found in Goa, Rajasthan, Tamil Nadu, Maharashtra, Madhya Pradesh, Kerala, Uttar Pradesh and Assam.

Discussion

14602.	Which organization of Gujarat is working for the development of non- conventional energy resources?
Answer» Gujarat Energy Development Agency (GEDA) is working for the development of non-conventional energy resources in Gujarat.

Discussion

14603.	Which of the following is not included in the minerals obtained from metamorphic rocks?(a) Diamond(b) Salt(c) Marble(d) Platinum
Answer» (d) Platinum

Discussion

14604.	Which organization was established for the development of non-conventional energy resources? When?
Answer» Commission for Additional Sources of Energy (CASE) was established in 1981 AD for the development of non-conventional energy resources in India.

Discussion

14605.	What is considered to be the backbone of economic development of any nation?
Answer» Minerals are considered to be the backbone of economic development of any nation.

Discussion

14606.	‘How you strive and endeavour to level woman down too’. means men push down women whenever the women A) assert themselves B) show what they are C) show what they can do D) All of the above.
Answer» D) All of the above.

Discussion

14607.	Various stages of human development are shown below. Select the correct arrangement.(1) Copper age(2) Iron age(3) Stone age(4) Bronze agev(5) Atomic age(a) 3, 1, 4, 2, 5(b) 3, 4, 2, 1, 5(c) 3, 5, 2, 4, 1(d) 4, 2, 5, 3, 1 2.
Answer» (a) 3, 1, 4, 2, 5

Discussion

14608.	A school in Palampur wants to show a bio-gas plant to its students of class 10th. Which nearest place will it select?(a) Dhuvaran(b) Dantiwada(c) Maithan(d) Undrel
Answer» Correct option is (a) Dhuvaran

Discussion

14609.	What does the poet mean by the phrase,’ raise its head’? Literally it means to straighten up after being flattened.
Answer» But metaphorically it means to survive and establish one’s identity again.

Discussion

14610.	Explain the ironical ideas used by the poet in the last stanza. How do you analyse them?
Answer» Irony is used at different levels in the last stanza. The poet accepts the fact that there are a whole lot of women who are unable to. withstand insult and succumb to shameful defeat. These are the ones who make way for the mighty. But the poet uses the word ‘mighty’ ironically because the ones who use their power to curb the power of others are not the ones who deserve the epithet of mighty. They are in fact petty. Similarly, it’s ironic that the grass that seems to be the weakest aspect of nature is resilient and can come back to life again and again despite the repeated onslaught against it.

Discussion

14611.	Who are grafted to the earth?
Answer» Those who cannot bear the defeat of their courage are grafted to the earth.

Discussion

14612.	The women who are like straw A) accept defeat and never grow B) are stuck down at the bottom C) are united with the earth D) All of the above.
Answer» D) All of the above.

Discussion

14613.	Look at the following phrases that are associated with certain ideas. Match them with the corresponding ideas given in the box below.1. unfurl underfoot 2. fulfill itself 3. scorching sense of shame 4. heat of emotions 5. scorching defeat 6. raise its head 7. make way for the mighty
Answer» 1. unfurl – underfoot 2. fulfill – itself 3. scorching sense of shame – embarrassed 4. heat of emotions – insult 5. scorching defeat – shameful defeat 6. raise its head – try to progress 7. make way for the mighty – outshine.

14613.

Look at the following phrases that are associated with certain ideas. Match them with the corresponding ideas given in the box below.1. unfurl underfoot 2. fulfill itself 3. scorching sense of shame 4. heat of emotions 5. scorching defeat 6. raise its head 7. make way for the mighty

Answer»

1. unfurl – underfoot

2. fulfill – itself

3. scorching sense of shame – embarrassed

4. heat of emotions – insult

5. scorching defeat – shameful defeat

6. raise its head – try to progress

7. make way for the mighty – outshine.

Discussion

14614.	Refer to lines four and five. Are they contrasting? Which one do you think is the poet referring to?
Answer» Lines four and five refer to the wetness of the grass and offer two possibilities for it. One is a sense of shame and the other is the heat of emotion. The poet definitely means the latter.

Discussion

14615.	Read the poem silently and choose words from the bubble that describe the mood of the poet. Give reasons for your answer.
Answer» Resentful: Though the poet does not directly express her bitterness, it is clear that she disapproves of the treatment meted out to women in society. So, we can say that she is resentful which means indignant, angry. Reflective, pensive, wistful: All these words mean that the poet is thoughtful. The poet is certainly contemplative of the fate of women in society. Dejected: Though the poet has the courage to put up a fight against the forces that push women down, the present scenario makes her feel dejected, which means, gloomy and depressed. Repulsive: Though repulsive is a strong word, we can choose it as reflective of the poet’s mood, because repulsive means revolting. We can see that the poet sows the seeds of revolt when she says that women who make way for men by being grafted to the ground are meek like straw. Stronger women like her are like the grass which has the ability to come up in life.

Discussion

14616.	What is the poet trying to tell us in lines 18 and 19?
Answer» Lines 18 and 19 refer to those women who succumb to the power that works against them. They get grafted to the earth and allow the more powerful to have their victory. They are like the weak straws. However, not all women are weak and feeble. Some women raise their heads and fight against the injustice. They are like the grass which unfurls and fulfils itself even as it is being trampled upon.

Discussion

14617.	Some officers from Government of India want to visit Gujarat to survey the possibility of using the geothermal energy in future in Gujarat. Which place they should avoid?(a) Tulsishyam(b) Unai(c) Saputara(d) Lasundra
Answer» (c) Saputara

Discussion

14618.	The poet has used some unusual words and phrases to evoke images in the reader’s mind as for instance, ‘scorching sense of shame’. Such a poetic device is called imagery. Pick out such phrases from the poem.
Answer» 1. unfurl underfoot 2. heat of emotions 3. flattening it into velvet 4. scorching defeat 5. grafted on to the earth 6. to make way for the mighty.

14618.

The poet has used some unusual words and phrases to evoke images in the reader’s mind as for instance, ‘scorching sense of shame’. Such a poetic device is called imagery. Pick out such phrases from the poem.

Answer»

1. unfurl underfoot

2. heat of emotions

3. flattening it into velvet

4. scorching defeat

5. grafted on to the earth

6. to make way for the mighty.

Discussion

14619.	What does the phrase ‘scorching defeat’ refer to? What does the poet mean by the words ‘grafted on to the earth’?
Answer» The phrase ‘scorching heat’ refers to the various forms of torture a woman faces in her life. Those who do not have the strength to overcome the violence and injustice, are grafted on to the earth. It means they don’t have the capacity to raise their heads.

Discussion

14620.	The Grass is Really Like Me by Kishwar Naheed About The Writer:
Answer» Kishwar Naheed is one of the best known women poets of Pakistan. She was bom in Bulandshahr, Uttar Pradesh, in the year 1940. Her poems have been translated into other languages such as English and Spanish. She has written for children and also penned a collection of traditional ghazals. She founded an organization named ‘Hawwa’ (Eve) which helps women without independent income to become financially independent, through cottage industries and selling handicrafts. She also used to write for the daily newspaper, ‘Jang’.

Discussion

14621.	Pick out the line from which the poet shifts the attention from ‘grass’ to ‘woman’. Who is the ‘you’ in line 11 ?
Answer» It is in line 11 that the poet moves from the impersonal to the personal. From the lawn mowers she moves on to men who dominate over women. ‘You’ refers to all those who victimise women.

Discussion

14622.	In what ways is the woman’s position comparable to that of the grass?
Answer» The poem presents the feelings of a woman in a male ‘ dominated society. It shows the way women are treated through an interesting metaphor. The woman identifies herself with the grass. For, the grass is trampled upon by people walking over it all the time. By mowing it from time to time, the grass is tamed and cut. Similarly, a woman is not free to act or to take decisions independently. Her freedom to do anything is curbed. Man, like the lawn mower which pulls down the grass, keeps pulling the woman down. The grass is soaked by water, scorched by the sun and pushed down by the lawn mower, all trying to annihilate it. So, the woman’s position in a maledominated society is comparable to that of the grass.

14622.

In what ways is the woman’s position comparable to that of the grass?

Answer»

The poem presents the feelings of a woman in a male ‘ dominated society. It shows the way women are treated through an interesting metaphor. The woman identifies herself with the grass. For, the grass is trampled upon by people walking over it all the time. By mowing it from time to time, the grass is tamed and cut. Similarly, a woman is not free to act or to take decisions independently.

Her freedom to do anything is curbed. Man, like the lawn mower which pulls down the grass, keeps pulling the woman down. The grass is soaked by water, scorched by the sun and pushed down by the lawn mower, all trying to annihilate it. So, the woman’s position in a maledominated society is comparable to that of the grass.

Discussion

14623.	Do you think the ‘lawn mowers’ are the same in the case of the grass and the poet?
Answer» No, the lawn mowers in the case of the grass are workers who are doing their duty. But the lawn mowers in the case of the poet are the chauvinistic people who don’t believe in the concept of equality of women.

Discussion

14624.	“The grass is also like me”. The word ‘me’ refers to A) the poet only B) people in general C) women in general D) one particular woman.
Answer» C) women in general

Discussion

14625.	‘It has to unfurl underfoot to fulfil itself means it has to A) wilt down and die B) prove its existence C) get trodden by people D) dry up and become straw.
Answer» B) prove its existence

Discussion

14626.	Explain the following with reference to the context:But neither the earth’s nor woman’s desire to manifest life dies.
Answer» The line above is taken from the poem, ‘The Grass is Really Like Me’. The poem is written by Kishwar Naheed, a well known poet of Pakistan. In these lines, the poet compares herself with earth. At the smallest opportunity and under the least congenial conditions, earth brings forth life. The desire to manifest life cannot be curbed or killed. A woman too, like the earth, is full of spirit. Her energy is used for creating life. So, it is not easy to suppress a woman. Her desire to manifest life springs forth.

14626.

Explain the following with reference to the context:But neither the earth’s nor woman’s desire to manifest life dies.

Answer»

The line above is taken from the poem, ‘The Grass is Really Like Me’. The poem is written by Kishwar Naheed, a well known poet of Pakistan.

In these lines, the poet compares herself with earth. At the smallest opportunity and under the least congenial conditions, earth brings forth life. The desire to manifest life cannot be curbed or killed. A woman too, like the earth, is full of spirit. Her energy is used for creating life. So, it is not easy to suppress a woman. Her desire to manifest life springs forth.

Discussion

14627.	Who is compared to the lawn mower?
Answer» Man, who suppresses women, is compared to the lawn mower.

Discussion

14628.	The poet compares her life to A) the life of another woman B) the life of a lawn mower C) the life of a blade of grass D) None of the above.
Answer» C) the life of a blade of grass

Discussion

14629.	What is the lawn mower obsessed with?
Answer» The lawn mower is obsessed with flattening the grass into velvet. As soon as it raises its head, the lawn mower mows it down.

Discussion

14630.	Define ‘state of motion’ of an object. Name the ‘agent’ which can change the state of motion of an object.
Answer» The state of motion of an object is defined by the speed acquired by it in a particular direction. Force can change the state of motion of an object.

Discussion

14631.	State one example where force stops a moving object.
Answer» A brake applied on bicycle to stop due to force.

Discussion

14632.	Which of the following change appreciably when a batsman hits a moving cricket ball? A. Shape B. Direction C. Size D. Speed A. A and B B. B and C C. A and C D. B and D
Answer» D. B and D The force can change the direction and Speed of motion.

14632.

Which of the following change appreciably when a batsman hits a moving cricket ball? A. Shape B. Direction C. Size D. Speed A. A and B B. B and C C. A and C D. B and D

Answer»

D. B and D

The force can change the direction and Speed of motion.

Discussion

14633.	A batsman hits the ball for a boundary past the bowler i.e. four runs. The batsman thus a) Changes the direction & speed of the ball b) Does not change the direction but speed onlyc) Does not change the speed but direction only d) Doesnotchangeeitherdirectionor speed
Answer» a) Changes the direction & speed of the ball.

Discussion

14634.	A ball rolling on the ground slows down and finally stops. This is because of a) Force b) Less force applied c) Friction d) None of the above
Answer» A ball rolling on the ground slows down and finally stops. This is because of Friction.

Discussion

14635.	Following are the graphs of elastic materials. Which one corresponds to that of brittle material?
Answer» (b) is more brittle. A material is said to be brittle if there is small stress-strain variation beyond elastic point and fracture point of brittle material lies close to elastic point.

Discussion

14636.	For a particle executing simple harmonic motion, the acceleration is proportional to(a) displacement from the mean position(b) distance from the mean position(c) distance travelled since t = 0(d) speed.
Answer» (a) displacement from the mean position EXPLANATION: Since a=-⍵²x, where x is the shortest instantaneous distance from the mean position i.e. magnitude of the displacement from the mean position. Hence (a) is true. The distance in (b) is scaler and thus is not the shortest instantaneous distance from the mean position. So not true. Due to the reason (b) and also at t=0 does not mean the mean position. (c) is not true. Acceleration is not proportional to the speed in SHM, hence (d) not true.

14636.

For a particle executing simple harmonic motion, the acceleration is proportional to(a) displacement from the mean position(b) distance from the mean position(c) distance travelled since t = 0(d) speed.

Answer»

(a) displacement from the mean position

EXPLANATION:

Since a=-⍵²x, where x is the shortest instantaneous distance from the mean position i.e. magnitude of the displacement from the mean position. Hence (a) is true.

The distance in (b) is scaler and thus is not the shortest instantaneous distance from the mean position. So not true.

Due to the reason (b) and also at t=0 does not mean the mean position. (c) is not true.

Acceleration is not proportional to the speed in SHM, hence (d) not true.

Discussion

14637.	Which of the following quantities are always positive in a simple harmonic motion?(a) vector F . vector a.(b) vector v . vector r.(c) vector a . vector r.(d) vector F . vector r.
Answer» (a) vector F . vector a.

Discussion

14638.	Which of the following quantities are always zero in a simple harmonic motion?(a) vector F x vector a.(b) vector v x vector r.(c) vector a x vector r.(d) vector F x vector r.
Answer» The correct answer is All. (a) F x a. (b) v x r . (c) a x r. (d) F x r. EXPLANATION: The cross product is a vector itself and its magnitude is the product of the magnitudes of the vectors and the sine of the angle between them. If the vectors are parallel or anti-parallel i.e. if the angle between them is zero or π, its sine becomes zero and the cross product becomes zero. Here all the vectors are along the same line either in the same direction or in opposite direction. Hence all options are zero.

14638.

Which of the following quantities are always zero in a simple harmonic motion?(a) vector F x vector a.(b) vector v x vector r.(c) vector a x vector r.(d) vector F x vector r.

Answer»

The correct answer is

All.

(a) F x a.

(b) v x r .

(c) a x r.

(d) F x r.

EXPLANATION:

The cross product is a vector itself and its magnitude is the product of the magnitudes of the vectors and the sine of the angle between them. If the vectors are parallel or anti-parallel i.e. if the angle between them is zero or π, its sine becomes zero and the cross product becomes zero.

Here all the vectors are along the same line either in the same direction or in opposite direction. Hence all options are zero.

Discussion

14639.	For a particle executing simple harmonic motion, the acceleration is proportional to (a) displacement from the mean position (b) distance from the mean position (c) distance travelled since t = 0 (d) speed.
Answer» (a) displacement from the mean position EXPLANATION: Since a=-⍵²x, where x is the shortest instantaneous distance from the mean position i.e. magnitude of the displacement from the mean position. Hence (a) is true. The distance in (b) is scaler and thus is not the shortest instantaneous distance from the mean position. So not true. Due to the reason (b) and also at t=0 does not mean the mean position. (c) is not true. Acceleration is not proportional to the speed in SHM, hence (d) not true.

14639.

For a particle executing simple harmonic motion, the acceleration is proportional to (a) displacement from the mean position (b) distance from the mean position (c) distance travelled since t = 0 (d) speed.

Answer»

(a) displacement from the mean position

EXPLANATION:

Since a=-⍵²x, where x is the shortest instantaneous distance from the mean position i.e. magnitude of the displacement from the mean position. Hence (a) is true.

The distance in (b) is scaler and thus is not the shortest instantaneous distance from the mean position. So not true.

Due to the reason (b) and also at t=0 does not mean the mean position. (c) is not true.

Acceleration is not proportional to the speed in SHM, hence (d) not true.

Discussion

14640.	In a simple harmonic motion (a) the potential energy is always equal to the kinetic energy (b) the potential energy is never equal to the kinetic energy (c) the average potential energy in any time interval jt equal to the average kinetic energy in that time interval (d) the average potential energy in one time period equal to the average kinetic energy in this period.
Answer» (d) the average potential energy in one time period equal to the average kinetic energy in this period. EXPLANATION: The sum of K.E. and P.E. is constant, they are not equal. (a) is not true. Since their sum is constant at any instant, at some instant they may be equal. (b) is not true. Near the mean position, K.E. is maximum while P.E. is minimum. Near the extremes, it is just the opposite. So if the time interval is chosen near the mean position or near the extremes, the average K.E. and P.E. will not be equal. (c) is not true. The variations of the K.E. and P.E. are exactly similar in one time period except that K.E. is maximum at the mean position while P.E. is maximum at the extremes. So the average P.E. and K.E. are equal in one time period. (d) is true.

14640.

In a simple harmonic motion (a) the potential energy is always equal to the kinetic energy (b) the potential energy is never equal to the kinetic energy (c) the average potential energy in any time interval jt equal to the average kinetic energy in that time interval (d) the average potential energy in one time period equal to the average kinetic energy in this period.

Answer»

(d) the average potential energy in one time period equal to the average kinetic energy in this period.

EXPLANATION:

The sum of K.E. and P.E. is constant, they are not equal. (a) is not true. Since their sum is constant at any instant, at some instant they may be equal. (b) is not true. Near the mean position, K.E. is maximum while P.E. is minimum. Near the extremes, it is just the opposite. So if the time interval is chosen near the mean position or near the extremes, the average K.E. and P.E. will not be equal. (c) is not true.

The variations of the K.E. and P.E. are exactly similar in one time period except that K.E. is maximum at the mean position while P.E. is maximum at the extremes. So the average P.E. and K.E. are equal in one time period. (d) is true.

Discussion

14641.	The average energy in one time period in simple harmonic motion is(a) 1/2mω2A2 (b) 1/4mω2A2(c) mω2A2 (d) zero.
Answer» (a) 1/2 m ω² A² EXPLANATION: The total energy at any instant in a simple harmonic motion is constant and equal to ½m⍵²A². Hence the average energy in one time period will also be the same = ½m⍵²A². So option (a).

14641.

The average energy in one time period in simple harmonic motion is(a) 1/2mω2A2 (b) 1/4mω2A2(c) mω2A2 (d) zero.

Answer»

(a) 1/2 m ω² A²

EXPLANATION:

The total energy at any instant in a simple harmonic motion is constant and equal to ½m⍵²A². Hence the average energy in one time period will also be the same = ½m⍵²A². So option (a).

Discussion

14642.	The displacement of a particle in simple harmonic motion in one time period is(a) A (b) 2A (c) 4A (d) zero.
Answer» The correct answer is (d) zero. EXPLANATION: The displacement is a vector and its magnitude is given by the line joining the initial position to the final position. Since after one time period the particle is at its initial position, hence it is zero. Option(d).

14642.

The displacement of a particle in simple harmonic motion in one time period is(a) A (b) 2A (c) 4A (d) zero.

Answer»

The correct answer is

(d) zero.

EXPLANATION:

The displacement is a vector and its magnitude is given by the line joining the initial position to the final position. Since after one time period the particle is at its initial position, hence it is zero. Option(d).

Discussion

14643.	The average acceleration in one time period in a simple harmonic motion is(a) Aω2 (b) Aω2/2 (c) Aω2/√2 (d) zero.
Answer» The correct answer is (d) zero. EXPLANATION: Since the acceleration is proportional to the displacement and always directed towards the mean position, half of one time period it is directed towards left and in rest half, it is towards the right. Hence the average acceleration in one time period is zero. Option (d).

14643.

The average acceleration in one time period in a simple harmonic motion is(a) Aω2 (b) Aω2/2 (c) Aω2/√2 (d) zero.

Answer»

The correct answer is

(d) zero.

EXPLANATION:

Since the acceleration is proportional to the displacement and always directed towards the mean position, half of one time period it is directed towards left and in rest half, it is towards the right. Hence the average acceleration in one time period is zero. Option (d).

Discussion

14644.	Which of the following quantities are always zero in a simple harmonic motion ?(a) F x a .(b) v x r .(c) a x r.(d) F x r.
Answer» The correct answer is All. (a) F x a. (b) v x r . (c) a x r. (d) F x r. EXPLANATION: The cross product is a vector itself and its magnitude is the product of the magnitudes of the vectors and the sine of the angle between them. If the vectors are parallel or anti-parallel i.e. if the angle between them is zero or π, its sine becomes zero and the cross product becomes zero. Here all the vectors are along the same line either in the same direction or in opposite direction. Hence all options are zero.

14644.

Which of the following quantities are always zero in a simple harmonic motion ?(a) F x a .(b) v x r .(c) a x r.(d) F x r.

Answer»

The correct answer is

All.

(a) F x a.

(b) v x r .

(c) a x r.

(d) F x r.

EXPLANATION:

The cross product is a vector itself and its magnitude is the product of the magnitudes of the vectors and the sine of the angle between them. If the vectors are parallel or anti-parallel i.e. if the angle between them is zero or π, its sine becomes zero and the cross product becomes zero.

Here all the vectors are along the same line either in the same direction or in opposite direction. Hence all options are zero.

Discussion

14645.	A student says that he had applied a force F= - k√x on a particle and the particle moved in simple harmonic motion. He refuses to tell whether fe is a constant or not. Assume that he has worked only with positive x and no other force acted on the particle. (a) As x increases k increases. (b) As x increases k decreases. (c) As x increases k remains constant. (d) The motion cannot be simple harmonic.
Answer» (a) As x increases k increases. Explanation: Since the motion is simple harmonic, the force F=-⍵²x where ⍵² is a constant. Equating the force applied by the student we get, -k/x=-⍵²x →k=⍵²x² It is clear from this relation that if x increases k increases.

14645.

A student says that he had applied a force F= - k√x on a particle and the particle moved in simple harmonic motion. He refuses to tell whether fe is a constant or not. Assume that he has worked only with positive x and no other force acted on the particle. (a) As x increases k increases. (b) As x increases k decreases. (c) As x increases k remains constant. (d) The motion cannot be simple harmonic.

Answer»

(a) As x increases k increases.

Explanation:

Since the motion is simple harmonic, the force F=-⍵²x where ⍵² is a constant. Equating the force applied by the student we get, -k/x=-⍵²x

→k=⍵²x²

It is clear from this relation that if x increases k increases.

Discussion

14646.	A student says that he had applied a force F = k√x on a particle and the particle moved in simple harmonic motion. He refuses to tell whether k is a constant or not. Assume that he has worked only with positive x and no other force acted on the particle.(a) As x increases k increases.(b) As x increases k decreases.(c) As x increases k remains constant.(d) The motion cannot be simple harmonic.
Answer» (a) As x increases k increases. Explanation: Since the motion is simple harmonic, the force F=-⍵²x where ⍵² is a constant. Equating the force applied by the student we get, -k/x=-⍵²x →k=⍵²x² It is clear from this relation that if x increases k increases.

14646.

A student says that he had applied a force F = k√x on a particle and the particle moved in simple harmonic motion. He refuses to tell whether k is a constant or not. Assume that he has worked only with positive x and no other force acted on the particle.(a) As x increases k increases.(b) As x increases k decreases.(c) As x increases k remains constant.(d) The motion cannot be simple harmonic.

Answer»

(a) As x increases k increases.

Explanation:

Since the motion is simple harmonic, the force F=-⍵²x where ⍵² is a constant. Equating the force applied by the student we get, -k/x=-⍵²x

→k=⍵²x²

It is clear from this relation that if x increases k increases.

Discussion

14647.	The average energy in one time period in simple harmonic motion is(a) 1/2 m ω2 A2 (b) 1/4 m ω2 A2 (c) m ω2 A2(d) zero.
Answer» (a) 1/2 m ω² A² EXPLANATION: The total energy at any instant in a simple harmonic motion is constant and equal to ½m⍵²A². Hence the average energy in one time period will also be the same = ½m⍵²A². So option (a).

14647.

The average energy in one time period in simple harmonic motion is(a) 1/2 m ω2 A2 (b) 1/4 m ω2 A2 (c) m ω2 A2(d) zero.

Answer»

(a) 1/2 m ω² A²

EXPLANATION:

The total energy at any instant in a simple harmonic motion is constant and equal to ½m⍵²A². Hence the average energy in one time period will also be the same = ½m⍵²A². So option (a).

Discussion

14648.	The average acceleration in one time period in a simple harmonic motion is(a) A ω2(b) A ω2/2(c) A ω2√2(d) zero.
Answer» The correct answer is (d) zero. EXPLANATION: Since the acceleration is proportional to the displacement and always directed towards the mean position, half of one time period it is directed towards left and in rest half, it is towards the right. Hence the average acceleration in one time period is zero. Option (d).

14648.

The average acceleration in one time period in a simple harmonic motion is(a) A ω2(b) A ω2/2(c) A ω2√2(d) zero.

Answer»

The correct answer is

(d) zero.

EXPLANATION:

Since the acceleration is proportional to the displacement and always directed towards the mean position, half of one time period it is directed towards left and in rest half, it is towards the right. Hence the average acceleration in one time period is zero. Option (d).

Discussion

14649.	The displacement of a particle in simple harmonic motion in one time period is(a) A(b) 2A(c) 4A(d) zero.
Answer» The correct answer is (d) zero. EXPLANATION: The displacement is a vector and its magnitude is given by the line joining the initial position to the final position. Since after one time period the particle is at its initial position, hence it is zero. Option(d).

14649.

The displacement of a particle in simple harmonic motion in one time period is(a) A(b) 2A(c) 4A(d) zero.

Answer»

The correct answer is

(d) zero.

EXPLANATION:

The displacement is a vector and its magnitude is given by the line joining the initial position to the final position. Since after one time period the particle is at its initial position, hence it is zero. Option(d).

Discussion

14650.	The time period of a particle in simple harmonic motion is equal to the time between consecutive appearances of the particle at a particular point in its motion. This point is(a) the mean position(b) an extreme position(c) between the mean position and the positive extreme(d) between the mean position and the negative extreme.
Answer» (b) an extreme position EXPLANATION: At the extreme position the particle is in the same phase at consecutive appearance, hence (b) is true. In all other options, the consecutive appearance of the particle is not in the same phase. All other options are not true.

14650.

The time period of a particle in simple harmonic motion is equal to the time between consecutive appearances of the particle at a particular point in its motion. This point is(a) the mean position(b) an extreme position(c) between the mean position and the positive extreme(d) between the mean position and the negative extreme.

Answer»

(b) an extreme position

EXPLANATION:

At the extreme position the particle is in the same phase at consecutive appearance, hence (b) is true. In all other options, the consecutive appearance of the particle is not in the same phase. All other options are not true.

Discussion

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