13232 + Interview Questions in Physics Page 32 InterviewSolution

1551.	Difference between acceleration and velocity
Answer» Difference between acceleration and velocity

Discussion

1552.	The ratio of the time taken by a uniform solid sphere and a disc of same mass and diameter to roll down from rest, through same distance on an inclined plane, is
Answer» The ratio of the time taken by a uniform solid sphere and a disc of same mass and diameter to roll down from rest, through same distance on an inclined plane, is

Discussion

1553.	The position of the hand shown in the figure corresponds to one of Fleming's rules.(a) Which Fleming's rule is illustrated by this hand?(b) In this figure of hand, what is indicated: (i) by the direction of forefinger? (ii) by the direction of thumb? (iii) by the direction of center finger?
Answer» The position of the hand shown in the figure corresponds to one of Fleming's rules. (a) Which Fleming's rule is illustrated by this hand? (b) In this figure of hand, what is indicated: (i) by the direction of forefinger? (ii) by the direction of thumb? (iii) by the direction of center finger?

Discussion

1554.	Rate of change of___is called velocity.
Answer» Rate of change of___is called velocity.

Discussion

1555.	Three rods of material X and three of material Y are connected as shown in figure. All the rods are identical in length and cross-sectional area. If the end A is maintained at 60∘C and the junction E at 10∘C, calculate the temperature at the junction B. The thermal conductivity of X is 800 Wm−1∘C−1 and that of Y is 400 Wm−1∘C−1.
Answer» Three rods of material $X$ and three of material $Y$ are connected as shown in figure. All the rods are identical in length and cross-sectional area. If the end $A$ is maintained at $60^{\circ} C$ and the junction $E$ at $10^{\circ} C$ , calculate the temperature at the junction $B$ . The thermal conductivity of $X$ is $800 {Wm}^{- 1}$ $^{\circ} C^{- 1}$ and that of $Y$ is $400 {Wm}^{- 1}$ $^{\circ} C^{- 1}$ .

Discussion

1556.	What is the difference between the snake's movement at the beginning of the poem and later when the poet strikes it with a log of wood? You may use relevant vocabulary from the poem to highlight the difference.
Answer» What is the difference between the snake's movement at the beginning of the poem and later when the poet strikes it with a log of wood? You may use relevant vocabulary from the poem to highlight the difference.

Discussion

1557.	Question 1When do we say that work is done?
Answer» Question 1 When do we say that work is done?

Discussion

1558.	The position of a body moving along x-axis at time t is given by x=t^{2 } -4t +6 m The dis†an ce travelled by body in time interval t=0 to t=3 -
Answer» The position of a body moving along x-axis at time t is given by x=t^{2 } -4t +6 m The dis†an ce travelled by body in time interval t=0 to t=3 -

Discussion

1559.	What is inertia and acceleration
Answer» What is inertia and acceleration

Discussion

1560.	ntAn echo repeats two syllables. If the velocity of sound is 330 m/s, the the distance of the reflecting surface isn
Answer» ntAn echo repeats two syllables. If the velocity of sound is 330 m/s, the the distance of the reflecting surface isn

Discussion

1561.	Four particles of masses m, 2m, 3m and 4m are arrangedat the corners of a parallelogram with each side equal to 'a' and one of the angle between two adjacent sides as 60^° .The parallelogram lies in the x-y plane with mass m at the origin and 4m on the x-axis. The centre of mass of the arrangement will be located at
Answer» Four particles of masses m, 2m, 3m and 4m are arrangedat the corners of a parallelogram with each side equal to 'a' and one of the angle between two adjacent sides as 60^° .The parallelogram lies in the x-y plane with mass m at the origin and 4m on the x-axis. The centre of mass of the arrangement will be located at

Discussion

1562.	Why Elders advice not to keep the head facing North while sleeping? Is this followed in Western countries too?
Answer» Why Elders advice not to keep the head facing North while sleeping? Is this followed in Western countries too?

Discussion

1563.	The angle of incidence of a ray of light passing through the centre of curvature of a spherical mirror is ______.
Answer» The angle of incidence of a ray of light passing through the centre of curvature of a spherical mirror is ______.

Discussion

1564.	How to calculate formal charge? How to know the value of t, (total number of electrons)?
Answer» How to calculate formal charge? How to know the value of t, (total number of electrons)?

Discussion

1565.	A train begins a journey from a station and travels 60 km in a time of 20 minutes. What is the average speed of the train?
Answer» A train begins a journey from a station and travels $60 k m$ in a time of $20 m i n u t e s$ . What is the average speed of the train?

Discussion

1566.	A physical balance has its arms of unequal length a body weighs 18 kg if it kept in one pan and weights 8 kg if kept in the other Pan the true weight of the body is
Answer» A physical balance has its arms of unequal length a body weighs 18 kg if it kept in one pan and weights 8 kg if kept in the other Pan the true weight of the body is

Discussion

1567.	गांधी जी की आत्मकथा 'सत्य के प्रयोग' की कक्षा में चर्चा कीजिए।
Answer» गांधी जी की आत्मकथा 'सत्य के प्रयोग' की कक्षा में चर्चा कीजिए।

Discussion

1568.	In a class, the teacher asks the students to name few scientists. The names that students told were -Einstein, Newton, Einstein, Faraday, Tesla, Hawking, Einstein, Tesla, Tesla, Faraday, Einstein.Which name has the highest frequency?
Answer» In a class, the teacher asks the students to name few scientists. The names that students told were - Einstein, Newton, Einstein, Faraday, Tesla, Hawking, Einstein, Tesla, Tesla, Faraday, Einstein. Which name has the highest frequency?

Discussion

1569.	A body of mass 5 Kg is raised vertically to a height of 10 m by a force of 170 N the velocity of the body at this height will be
Answer» A body of mass 5 Kg is raised vertically to a height of 10 m by a force of 170 N the velocity of the body at this height will be

Discussion

1570.	Question 2The value of acceleration due to gravity(a) is same on equator and poles(b) is least on poles(c) is least on equator(d) increases from pole to equator
Answer» Question 2 The value of acceleration due to gravity (a) is same on equator and poles (b) is least on poles (c) is least on equator (d) increases from pole to equator

Discussion

1571.	The two ends of a train moving with cons†an t acceleration pass a certain point with velocities u and 3u .The velocity with which the middle point passes the same point is
Answer» The two ends of a train moving with cons†an t acceleration pass a certain point with velocities u and 3u .The velocity with which the middle point passes the same point is

Discussion

1572.	A wheel starting from rest is uniformly accelerated at 2 rad/s^2 for 20 seconds. It is allowed to rotate uniformly or the next 10 seconds and is finally brought to rest in next 20 seconds. The total angle rotated by the(in radian) is(1) 600(3) 1800(2) 1200(4) 300
Answer» A wheel starting from rest is uniformly accelerated at 2 rad/s^2 for 20 seconds. It is allowed to rotate uniformly or the next 10 seconds and is finally brought to rest in next 20 seconds. The total angle rotated by the(in radian) is(1) 600(3) 1800(2) 1200(4) 300

Discussion

1573.	How does balanced force change the shape of an object?
Answer» How does balanced force change the shape of an object?

Discussion

1574.	1. a wooden block is placed inside a rotating cylindrical shell of radius 4 mif coefficient of friction between the block and shell is 0.2 then ehat should be the angular velocity so that wooden block oes not fall?
Answer» 1. a wooden block is placed inside a rotating cylindrical shell of radius 4 mif coefficient of friction between the block and shell is 0.2 then ehat should be the angular velocity so that wooden block oes not fall?

Discussion

1575.	If the current through a conductor is 10 A, what is the charge flowing through it for 5 s?
Answer» If the current through a conductor is $10 A$ , what is the charge flowing through it for $5 s$ ?

Discussion

1576.	The time period of two pendulums is 2 s and 1.2 s respectively. Find the ratio of their lengths.
Answer» The time period of two pendulums is 2 s and 1.2 s respectively. Find the ratio of their lengths.

Discussion

1577.	Differentiate between the scalar and vector quantities, giving two examples of each.
Answer» Differentiate between the scalar and vector quantities, giving two examples of each.

Discussion

1578.	1kg 11 g + 4 kg 3 g + 10 kg 46 g + 16 kg 892 g = ________.
Answer» 1kg 11 g + 4 kg 3 g + 10 kg 46 g + 16 kg 892 g = ________.

Discussion

1579.	Two projectiles are thrown from point A & B, towards each other, A and B are separated by 130 m. A is thrown with 20 m/s. Calculate the minimum velocity in m/s with which B is to be thrown, such that they just meet on the ground? (the projectiles can be thrown at any angle) [take g = 10 m/s2] ___
Answer» Two projectiles are thrown from point A & B, towards each other, A and B are separated by 130 m. A is thrown with 20 m/s. Calculate the minimum velocity in m/s with which B is to be thrown, such that they just meet on the ground? (the projectiles can be thrown at any angle) [take g = 10 m/ $s^{2}$ ] ___

Discussion

1580.	नीचे कुछ शब्दों के नीचे रेखा खिंची हुई है। उन्हें ध्यान में रखते हुए नीचे लिखे वाक्यों को अपने शब्दों में लिखो।(क) बित्तो घोड़े पर सवार हो गई।(ख) तुम घर की गाय को शेर के हवाले कर रहे थे।(ग) आज एक राक्षसी से पाला पड़ गया।(घ) अगर बैल आपके हाथ न आए तो मेरा नाम भेड़िया नहीं।(ङ) शेर को देखते ही किसान के होश-हवास गुम हो गए।
Answer» नीचे कुछ शब्दों के नीचे रेखा खिंची हुई है। उन्हें ध्यान में रखते हुए नीचे लिखे वाक्यों को अपने शब्दों में लिखो। (क) बित्तो घोड़े पर सवार हो गई। (ख) तुम घर की गाय को शेर के हवाले कर रहे थे। (ग) आज एक राक्षसी से पाला पड़ गया। (घ) अगर बैल आपके हाथ न आए तो मेरा नाम भेड़िया नहीं। (ङ) शेर को देखते ही किसान के होश-हवास गुम हो गए।

1580.

नीचे कुछ शब्दों के नीचे रेखा खिंची हुई है। उन्हें ध्यान में रखते हुए नीचे लिखे वाक्यों को अपने शब्दों में लिखो।(क) बित्तो घोड़े पर सवार हो गई।(ख) तुम घर की गाय को शेर के हवाले कर रहे थे।(ग) आज एक राक्षसी से पाला पड़ गया।(घ) अगर बैल आपके हाथ न आए तो मेरा नाम भेड़िया नहीं।(ङ) शेर को देखते ही किसान के होश-हवास गुम हो गए।

Answer»

नीचे कुछ शब्दों के नीचे रेखा खिंची हुई है। उन्हें ध्यान में रखते हुए नीचे लिखे वाक्यों को अपने शब्दों में लिखो।

(क) बित्तो घोड़े पर सवार हो गई।

(ख) तुम घर की गाय को शेर के हवाले कर रहे थे।

(ग) आज एक राक्षसी से पाला पड़ गया।

(घ) अगर बैल आपके हाथ न आए तो मेरा नाम भेड़िया नहीं।

(ङ) शेर को देखते ही किसान के होश-हवास गुम हो गए।

Discussion

1581.	Motion of a satellite in circular orbit is an example of
Answer» Motion of a satellite in circular orbit is an example of

Discussion

1582.	A charge Q is placed at a dis†an ce δ→0 near one of the corners of a cube of on a line of symmetry along diagonal a) What is the flux through each of the surfaces containing point a ? b) What is the flux through other 3 faces
Answer» A charge Q is placed at a dis†an ce δ→0 near one of the corners of a cube of on a line of symmetry along diagonal a) What is the flux through each of the surfaces containing point a ? b) What is the flux through other 3 faces

Discussion

1583.	I have a glass of water at room temperature and hot mug of coffee, both kept inside a closed room. As the coffee cools down, what happens to the temperature of the glass of water? ( Room is perfectly insulated from outside)
Answer» I have a glass of water at room temperature and hot mug of coffee, both kept inside a closed room. As the coffee cools down, what happens to the temperature of the glass of water? ( Room is perfectly insulated from outside)

Discussion

1584.	An air bubble of radius 1 cm in water has an upward acceleration 9.8 cm/s2. The density of water is 1 g/cm3 and water offers negligible drag force on the bubble. The mass of the bubble is (g=980 cm/s2)
Answer» An air bubble of radius $1 cm$ in water has an upward acceleration $9.8 {cm/s}^{2} .$ The density of water is $1 {g/cm}^{3}$ and water offers negligible drag force on the bubble. The mass of the bubble is $(g = 980 {cm/s}^{2})$

Discussion

1585.	Find current through 4 Ω resistance in the given circuit ?
Answer» Find current through $4 Ω$ resistance in the given circuit ?

Discussion

1586.	Two boys A and B are standing at two positions on a staircase. B has a 500 g ball in his hand which is 50 cm higher than the platform he is on. Each step is 20 cm high and 20 cm wide.B drops the ball from his hand down the stairs and A stops the ball on the second step. Find the change in potential energy of the ball. Consider g =10 m s−2 and assume that there is no loss of energy when the ball rolls down the staircase.
Answer» Two boys $A$ and $B$ are standing at two positions on a staircase. $B$ has a $500 g$ ball in his hand which is $50 cm$ higher than the platform he is on. Each step is $20 cm$ high and $20 cm$ wide. $B$ drops the ball from his hand down the stairs and $A$ stops the ball on the second step. Find the change in potential energy of the ball. Consider $g$ $= 10 {m s}^{- 2}$ and assume that there is no loss of energy when the ball rolls down the staircase.

Discussion

1587.	27.A force acts for 0.1 second on a body of mass 1.2 kg initially at rest. The force then ceases to act and the body moves through 2metre in the next 1.0 second. Find the magnitude of force.
Answer» 27.A force acts for 0.1 second on a body of mass 1.2 kg initially at rest. The force then ceases to act and the body moves through 2metre in the next 1.0 second. Find the magnitude of force.

Discussion

1588.	If the radius of the earth shrinks by 4% and there is no change in its mass then by how much does the value of g change?( Given for x<<1 , assume 1(1−x)2≈1+2x)
Answer» If the radius of the earth shrinks by $4 %$ and there is no change in its mass then by how much does the value of $g$ change? ( Given for $x << 1$ , assume $\frac{1}{(1 - x)^{2}} \approx 1 + 2 x$ )

Discussion

1589.	A boy, standing on a 49 m high cliff drops a stone. One second later he throws another stone vertically downwards. Both the stones hit the ground at the same time. With what speed was the second stone thrown?
Answer» A boy, standing on a 49 m high cliff drops a stone. One second later he throws another stone vertically downwards. Both the stones hit the ground at the same time. With what speed was the second stone thrown?

Discussion

1590.	Potential energy curve of a body of mass m=2kg is shown in the figure, it is released from rest at point A.maximum distance covered by it on the positive x-axis till it momentarily comes to rest from the origin is
Answer» Potential energy curve of a body of mass m=2kg is shown in the figure, it is released from rest at point A.maximum distance covered by it on the positive x-axis till it momentarily comes to rest from the origin is

Discussion

1591.	Derivation of keplers 3rd law without gravitational formula
Answer» Derivation of keplers 3rd law without gravitational formula

Discussion

1592.	Which type of pulley is helpful in changing the direction of effort?
Answer» Which type of pulley is helpful in changing the direction of effort?

Discussion

1593.	Calculate the value of acceleration due to gravity on the surface of a planet, which has mass, twice as that of Earth, and radius, half as that of Earth.
Answer» Calculate the value of acceleration due to gravity on the surface of a planet, which has mass, twice as that of Earth, and radius, half as that of Earth.

Discussion

1594.	Which of the following would probably show the acceleration time graph for a body whose velocity-time graph is shown in the figure?
Answer» Which of the following would probably show the acceleration time graph for a body whose velocity-time graph is shown in the figure?

Discussion

1595.	If R1 and R2 are the resistance of a conductor at two temperatures t01C and t02C respectively, show that the temperature coefficient of resistance,α=R2−R1R1t2−R2t1
Answer» If $R_{1}$ and $R_{2}$ are the resistance of a conductor at two temperatures $t_{1}^{0} C$ and $t_{2}^{0} C$ respectively, show that the temperature coefficient of resistance, $α = \frac{R_{2} - R_{1}}{R_{1} t_{2} - R_{2} t_{1}}$

Discussion

1596.	A bullet of 5 g is fired from a pistol of 1.5 kg. If the recoil velocity of pistol is 1.5 ms−1, what is the final momentum of the pistol?
Answer» A bullet of 5 g is fired from a pistol of 1.5 kg. If the recoil velocity of pistol is $1.5 m s^{- 1}$ , what is the final momentum of the pistol?

Discussion

1597.	In a heated tennis match Nadal returns the ball straight to Federer at 40 m/s speed. Federer returns the ball straight back to Nadal at 30 m/s. Given the mass of ball to be 12 kg, find the impulse with which Federer returned the ball?
Answer» In a heated tennis match Nadal returns the ball straight to Federer at 40 m/s speed. Federer returns the ball straight back to Nadal at 30 m/s. Given the mass of ball to be 12 kg, find the impulse with which Federer returned the ball?

Discussion

1598.	युधिष्ठिर ने आचार्य द्रोण से कहा-"अश्वत्थामा मारा गया, मनुष्य नहीं, हाथी।" युधिष्ठिर सच बोलने के लिए प्रसिद्ध थे। तुम्हारे विचार से उन्होंने द्रोण से सच कहा था या झूठ? अपने उत्तर का कारण भी बताओ।
Answer» युधिष्ठिर ने आचार्य द्रोण से कहा-"अश्वत्थामा मारा गया, मनुष्य नहीं, हाथी।" युधिष्ठिर सच बोलने के लिए प्रसिद्ध थे। तुम्हारे विचार से उन्होंने द्रोण से सच कहा था या झूठ? अपने उत्तर का कारण भी बताओ।

Discussion

1599.	Enunciate the Newton's first law of motion.
Answer» Enunciate the Newton's first law of motion.

Discussion

1600.	108.A battery of emf 10V is connected to a group of resistance as shown in figure. The potential difference between A and B is
Answer» 108.A battery of emf 10V is connected to a group of resistance as shown in figure. The potential difference between A and B is

Discussion

Explore topic-wise InterviewSolutions in .

Difference between acceleration and velocity

The ratio of the time taken by a uniform solid sphere and a disc of same mass and diameter to roll down from rest, through same distance on an inclined plane, is

The position of the hand shown in the figure corresponds to one of Fleming's rules.(a) Which Fleming's rule is illustrated by this hand?(b) In this figure of hand, what is indicated: (i) by the direction of forefinger? (ii) by the direction of thumb? (iii) by the direction of center finger?

Rate of change of___is called velocity.

What is the difference between the snake's movement at the beginning of the poem and later when the poet strikes it with a log of wood? You may use relevant vocabulary from the poem to highlight the difference.

Question 1When do we say that work is done?

The position of a body moving along x-axis at time t is given by x=t^{2 } -4t +6 m The dis†an ce travelled by body in time interval t=0 to t=3 -

What is inertia and acceleration

ntAn echo repeats two syllables. If the velocity of sound is 330 m/s, the the distance of the reflecting surface isn

Why Elders advice not to keep the head facing North while sleeping? Is this followed in Western countries too?

The angle of incidence of a ray of light passing through the centre of curvature of a spherical mirror is ______.

How to calculate formal charge? How to know the value of t, (total number of electrons)?

A train begins a journey from a station and travels 60 km in a time of 20 minutes. What is the average speed of the train?

A physical balance has its arms of unequal length a body weighs 18 kg if it kept in one pan and weights 8 kg if kept in the other Pan the true weight of the body is

गांधी जी की आत्मकथा 'सत्य के प्रयोग' की कक्षा में चर्चा कीजिए।

In a class, the teacher asks the students to name few scientists. The names that students told were -Einstein, Newton, Einstein, Faraday, Tesla, Hawking, Einstein, Tesla, Tesla, Faraday, Einstein.Which name has the highest frequency?

A body of mass 5 Kg is raised vertically to a height of 10 m by a force of 170 N the velocity of the body at this height will be

Question 2The value of acceleration due to gravity(a) is same on equator and poles(b) is least on poles(c) is least on equator(d) increases from pole to equator

The two ends of a train moving with cons†an t acceleration pass a certain point with velocities u and 3u .The velocity with which the middle point passes the same point is

A wheel starting from rest is uniformly accelerated at 2 rad/s^2 for 20 seconds. It is allowed to rotate uniformly or the next 10 seconds and is finally brought to rest in next 20 seconds. The total angle rotated by the(in radian) is(1) 600(3) 1800(2) 1200(4) 300

How does balanced force change the shape of an object?

1. a wooden block is placed inside a rotating cylindrical shell of radius 4 mif coefficient of friction between the block and shell is 0.2 then ehat should be the angular velocity so that wooden block oes not fall?

If the current through a conductor is 10 A, what is the charge flowing through it for 5 s?

The time period of two pendulums is 2 s and 1.2 s respectively. Find the ratio of their lengths.

Differentiate between the scalar and vector quantities, giving two examples of each.

1kg 11 g + 4 kg 3 g + 10 kg 46 g + 16 kg 892 g = ________.

Motion of a satellite in circular orbit is an example of

A charge Q is placed at a dis†an ce δ→0 near one of the corners of a cube of on a line of symmetry along diagonal a) What is the flux through each of the surfaces containing point a ? b) What is the flux through other 3 faces

I have a glass of water at room temperature and hot mug of coffee, both kept inside a closed room. As the coffee cools down, what happens to the temperature of the glass of water? ( Room is perfectly insulated from outside)

An air bubble of radius 1 cm in water has an upward acceleration 9.8 cm/s2. The density of water is 1 g/cm3 and water offers negligible drag force on the bubble. The mass of the bubble is (g=980 cm/s2)

Find current through 4 Ω resistance in the given circuit ?

27.A force acts for 0.1 second on a body of mass 1.2 kg initially at rest. The force then ceases to act and the body moves through 2metre in the next 1.0 second. Find the magnitude of force.

If the radius of the earth shrinks by 4% and there is no change in its mass then by how much does the value of g change?( Given for x&lt;&lt;1 , assume 1(1−x)2≈1+2x)

A boy, standing on a 49 m high cliff drops a stone. One second later he throws another stone vertically downwards. Both the stones hit the ground at the same time. With what speed was the second stone thrown?

Potential energy curve of a body of mass m=2kg is shown in the figure, it is released from rest at point A.maximum distance covered by it on the positive x-axis till it momentarily comes to rest from the origin is

Derivation of keplers 3rd law without gravitational formula

Which type of pulley is helpful in changing the direction of effort?

Calculate the value of acceleration due to gravity on the surface of a planet, which has mass, twice as that of Earth, and radius, half as that of Earth.

Which of the following would probably show the acceleration time graph for a body whose velocity-time graph is shown in the figure?

If R1 and R2 are the resistance of a conductor at two temperatures t01C and t02C respectively, show that the temperature coefficient of resistance,α=R2−R1R1t2−R2t1

A bullet of 5 g is fired from a pistol of 1.5 kg. If the recoil velocity of pistol is 1.5 ms−1, what is the final momentum of the pistol?

In a heated tennis match Nadal returns the ball straight to Federer at 40 m/s speed. Federer returns the ball straight back to Nadal at 30 m/s. Given the mass of ball to be 12 kg, find the impulse with which Federer returned the ball?

Enunciate the Newton's first law of motion.

108.A battery of emf 10V is connected to a group of resistance as shown in figure. The potential difference between A and B is

If the radius of the earth shrinks by 4% and there is no change in its mass then by how much does the value of g change?( Given for x<<1 , assume 1(1−x)2≈1+2x)