13232 + Interview Questions in Physics Page 37 InterviewSolution

1801.	What is mass
Answer» What is mass

Discussion

1802.	A ball is projected from a certain point on the surface of a planet at a certain angle with the horizontal surface The horizontal and vertical displacement x and y vary with time t in seconds v as : X = 10*3^1/2 t Y = 10t-t^2 The maximum height by ball is?.
Answer» A ball is projected from a certain point on the surface of a planet at a certain angle with the horizontal surface The horizontal and vertical displacement x and y vary with time t in seconds v as : X = 10*3^1/2 t Y = 10t-t^2 The maximum height by ball is?.

1802.

A ball is projected from a certain point on the surface of a planet at a certain angle with the horizontal surface The horizontal and vertical displacement x and y vary with time t in seconds v as : X = 10*3^1/2 t Y = 10t-t^2 The maximum height by ball is?.

Answer»

A ball is projected from a certain point on the surface of a planet at a certain angle with the horizontal surface

The horizontal and vertical displacement x and y vary with time t in seconds v as :

X = 10*3^1/2 t

Y = 10t-t^2

The maximum height by ball is?.

Discussion

1803.	What should be the position of the object in front of a concave mirror so that a virtual and magnified image is observed?
Answer» What should be the position of the object in front of a concave mirror so that a virtual and magnified image is observed?

Discussion

1804.	State two applications of the universal law of gravitation.
Answer» State two applications of the universal law of gravitation.

Discussion

1805.	The acceleration due to gravity on Earth does not depend upon
Answer» The acceleration due to gravity on Earth does not depend upon

Discussion

1806.	Question 3Abdul, while driving to school, computes the average speed for his trip to be 20 kmph. On his return trip along the same route, there is less traffic and the average speed is 40 kmph. What is the average speed for Abdul’s trip?
Answer» Question 3 Abdul, while driving to school, computes the average speed for his trip to be $20 k m p h$ . On his return trip along the same route, there is less traffic and the average speed is $40 k m p h$ . What is the average speed for Abdul’s trip?

Discussion

1807.	Give scientific reasons;(1) The ships entering fresh water from sea water sink to a greater extent.(2) The cutting edges of tools like knives, blades etc are provided with sharp edges.
Answer» Give scientific reasons; (1) The ships entering fresh water from sea water sink to a greater extent. (2) The cutting edges of tools like knives, blades etc are provided with sharp edges.

1807.

Give scientific reasons;(1) The ships entering fresh water from sea water sink to a greater extent.(2) The cutting edges of tools like knives, blades etc are provided with sharp edges.

Answer»

Give scientific reasons;

(1) The ships entering fresh water from sea water sink to a greater extent.

(2) The cutting edges of tools like knives, blades etc are provided with sharp edges.

Discussion

1808.	A particle moving along x axis as x=⅓t^3 +2t^2-32t+4 the accerlation of particle is when its velocity becomes zero
Answer» A particle moving along x axis as x=⅓t^3 +2t^2-32t+4 the accerlation of particle is when its velocity becomes zero

Discussion

1809.	A particle is dropped from the surface of earth, then find its velocity when it reaches at the centre of the earth.
Answer» A particle is dropped from the surface of earth, then find its velocity when it reaches at the centre of the earth.

Discussion

1810.	In a process over a fixed diaphragm area a pressure of 50 kPa is used to open a valve. The force generated in this way is 500 kN. If the same (diaphragm) valve is used in another process requires a pressure of 30 kPa to open the value then the difference in the force of original process to the new process in kN is __________?200
Answer» In a process over a fixed diaphragm area a pressure of 50 kPa is used to open a valve. The force generated in this way is 500 kN. If the same (diaphragm) valve is used in another process requires a pressure of 30 kPa to open the value then the difference in the force of original process to the new process in kN is __________? 200

Discussion

1811.	List the measures that you will take when designing a sound-proof room.
Answer» List the measures that you will take when designing a sound-proof room.

Discussion

1812.	What are the characteristics of liquid pressure?
Answer» What are the characteristics of liquid pressure?

Discussion

1813.	the velocity of a moving particle is given by v=\sqrt{4x} if at t=0 particle is at x=0, then velocity and acceleration at t=2
Answer» the velocity of a moving particle is given by v=\sqrt{4x} if at t=0 particle is at x=0, then velocity and acceleration at t=2

Discussion

1814.	why is acceleration due to gravity taken as -9.8 even for downward motion
Answer» why is acceleration due to gravity taken as -9.8 even for downward motion

Discussion

1815.	A barometer kept in an elevator accelerating upward reads 76 cm. The air pressure in the elevator is
Answer» A barometer kept in an elevator accelerating upward reads 76 cm. The air pressure in the elevator is

Discussion

1816.	A beam of light is converging towards a point I on a screen. A plane glass plate whose thickness in the direction of the beam = t, refractive index =μ , is introduced in the path of the beam. The convergence point is shifted by
Answer» A beam of light is converging towards a point I on a screen. A plane glass plate whose thickness in the direction of the beam = t, refractive index = $μ$ , is introduced in the path of the beam. The convergence point is shifted by

Discussion

1817.	Who applies the the centripetal force
Answer» Who applies the the centripetal force

Discussion

1818.	ntan athlete takes 100g of glucose of energy equivalent to 1560 KJ. how much amount of energy is uptaken by 1g molecule of glucosen
Answer» ntan athlete takes 100g of glucose of energy equivalent to 1560 KJ. how much amount of energy is uptaken by 1g molecule of glucosen

Discussion

1819.	A hollow sphere which has a small hole in its bottom is immersed in water to a depth of 30 cm beforeany water enters in it. If the surface tension of water is 75 dynes/cm then find the radius of the hole inmetres (taking g-10 m/s?)
Answer» A hollow sphere which has a small hole in its bottom is immersed in water to a depth of 30 cm beforeany water enters in it. If the surface tension of water is 75 dynes/cm then find the radius of the hole inmetres (taking g-10 m/s?)

Discussion

1820.	An engine pumps a fluid of density 800kg/m3 through a tube of regular cross-sectional area of 5cm2 with a speed of 20cm/s. The rate at which kinetic energy is given to the fluid is
Answer» An engine pumps a fluid of density $800 k g / m^{3}$ through a tube of regular cross-sectional area of $5 c m^{2}$ with a speed of $20 c m / s .$ The rate at which kinetic energy is given to the fluid is

Discussion

1821.	A force, when applied on a body, can
Answer» A force, when applied on a body, can

Discussion

1822.	Three objects A, B, and C are in a liquid, as shown. Arrange them in the correct order of density, from the lowest to the highest.
Answer» Three objects A, B, and C are in a liquid, as shown. Arrange them in the correct order of density, from the lowest to the highest.

Discussion

1823.	Which of the following needs to be constant for Charles' law?
Answer» Which of the following needs to be constant for Charles' law?

Discussion

1824.	A tarin travels with a speed of 60 m h−1 from station A and station B and then comes back with a speed 80 m h−1 from station B to station A.Find:(i) the average speed, and (ii) the velocity of train.
Answer» A tarin travels with a speed of 60 $m h^{- 1}$ from station A and station B and then comes back with a speed 80 $m h^{- 1}$ from station B to station A.Find:(i) the average speed, and (ii) the velocity of train.

Discussion

1825.	In a 3− stage air compressor, the inlet pressure is p1, discharge pressure is p4 and the intermediate pressures are p2 and p3(p2<p3). The total pressure ratio of the compressor is 10 and the pressure ratios of the stages are equal. If p1=100kPa, the value of the pressure p3 (in kPa) is464.16
Answer» In a $3 -$ stage air compressor, the inlet pressure is $p_{1}$ , discharge pressure is $p_{4}$ and the intermediate pressures are $p_{2}$ and $p_{3} (p_{2} < p_{3})$ . The total pressure ratio of the compressor is $10$ and the pressure ratios of the stages are equal. If $p_{1} = 100 k P a$ , the value of the pressure $p_{3}$ (in $k P a$ ) is 464.16

Discussion

1826.	Q.Ifa hole is made at the centre of a bar magnet then its magnetic moment will be (1)decrease (2)increase (3)unchange(4)ay increase or decrease
Answer» Q.Ifa hole is made at the centre of a bar magnet then its magnetic moment will be (1)decrease (2)increase (3)unchange(4)ay increase or decrease

Discussion

1827.	How can we identify that an object is in motion?
Answer» How can we identify that an object is in motion?

Discussion

1828.	In a vernier callipers, one main scale division is 1mm and 9 main scale divisions are equal to 10 vernier scale divisions . When nothing is put between jaws of the callipers , zero of the vernier scale lies to the right side of zero of the main scale and the 2nd division of the vernier scale coincides with a main scale division. While measuring inner diameter of a hollow cylinder the zero of vernier scale lies between 1.7 cm and 1.8 cm of the main scale. Also, 8th division of the vernier scale coincides with a main scale division . Inner diameter of the cylinder is
Answer» In a vernier callipers, one main scale division is 1mm and 9 main scale divisions are equal to 10 vernier scale divisions . When nothing is put between jaws of the callipers , zero of the vernier scale lies to the right side of zero of the main scale and the 2nd division of the vernier scale coincides with a main scale division. While measuring inner diameter of a hollow cylinder the zero of vernier scale lies between 1.7 cm and 1.8 cm of the main scale. Also, 8th division of the vernier scale coincides with a main scale division . Inner diameter of the cylinder is

Discussion

1829.	A bicycle increases its velocity from 10km/h to 15km/h in 6 seconds. Calculate its acceleration.
Answer» A bicycle increases its velocity from 10km/h to 15km/h in 6 seconds. Calculate its acceleration.

Discussion

1830.	A rectangular block is 10 cm x 10 cm x 15 cm insize is floating in water with 10 cm side vertical. Ifitfloats with 15 cm side vertical, then the level of waterwill(1) Rise(2) Fall(3) Remain same(4) Change according to density of block
Answer» A rectangular block is 10 cm x 10 cm x 15 cm in size is floating in water with 10 cm side vertical. Ifit floats with 15 cm side vertical, then the level of water will (1) Rise (2) Fall (3) Remain same (4) Change according to density of block

Discussion

1831.	Consider two blocks of masses m1 and m2 placed in contact with each other on a friction less horizontal surface. Let a force F be applied on block of mass m1, then the value of contact force between the blocks is
Answer» Consider two blocks of masses m₁and m₂ placed in contact with each other on a friction less horizontal surface. Let a force F be applied on block of mass m₁, then the value of contact force between the blocks is

1831.

Consider two blocks of masses m1 and m2 placed in contact with each other on a friction less horizontal surface. Let a force F be applied on block of mass m1, then the value of contact force between the blocks is

Answer»

Consider two blocks of masses m₁and m₂ placed in contact with each other on a friction less horizontal surface. Let a force F be applied on block of mass m₁, then the value of contact force between the blocks is

Discussion

1832.	A car travelling with a constant speed of 24 msalong South to North direction crosses a intersectionat time t 0. Another car moving with speed of30 msalong West to East direction crosses theintersection at t = 5 s. The displacement betweenthem at t 2 second is
Answer» A car travelling with a constant speed of 24 msalong South to North direction crosses a intersectionat time t 0. Another car moving with speed of30 msalong West to East direction crosses theintersection at t = 5 s. The displacement betweenthem at t 2 second is

Discussion

1833.	Which part of the solar cooker is responsible for greenhouse-like effect?
Answer» Which part of the solar cooker is responsible for greenhouse-like effect?

1833.

Which part of the solar cooker is responsible for greenhouse-like effect?

Answer»

Which part of the solar cooker is responsible for greenhouse-like effect?

Discussion

1834.	A crane lifts a block of mass 1000 Kg through a vertical height of 15 m in 25 sec. Calculate the power of crane. Given g = 10 m/s2.
Answer» A crane lifts a block of mass 1000 Kg through a vertical height of 15 m in 25 sec. Calculate the power of crane. Given g = 10 m/s².

Discussion

1835.	Complete the following : (a) 1 nano second = ..............................S. (b) 1μs =................................S. (c) 1 mean solar day = ................................S. (d) 1 year =.................................S.
Answer» Complete the following : (a) 1 nano second = ..............................S. (b) 1 $μ$ s =................................S. (c) 1 mean solar day = ................................S. (d) 1 year =.................................S.

1835.

Complete the following : (a) 1 nano second = ..............................S. (b) 1μs =................................S. (c) 1 mean solar day = ................................S. (d) 1 year =.................................S.

Answer»

Complete the following :

(a) 1 nano second = ..............................S.

(b) 1 $μ$ s =................................S.

(c) 1 mean solar day = ................................S.

(d) 1 year =.................................S.

Discussion

1836.	What is the power of a pump which takes 10 seconds to lift 100 kg of water to a water tank situated at a height of 20 m? (g=10 ms−2) [2 MARKS]
Answer» What is the power of a pump which takes 10 seconds to lift 100 kg of water to a water tank situated at a height of 20 m? ( $g = 10 m s^{- 2}$ ) [2 MARKS]

Discussion

1837.	Action and Reaction always act on two different bodies and always occur in pair. What is the meaning of this statement?
Answer» Action and Reaction always act on two different bodies and always occur in pair. What is the meaning of this statement?

Discussion

1838.	Q. An object of mass 80 kg moving with velocity 2metre per second hit by collides with another object of masss 20 kg moving with velocity 4 metre per second . Find the loss of energy assuming a perfectly inelastic collision.
Answer» Q. An object of mass 80 kg moving with velocity 2metre per second hit by collides with another object of masss 20 kg moving with velocity 4 metre per second . Find the loss of energy assuming a perfectly inelastic collision.

Discussion

1839.	State the positions of neutral points when a magnet is placed with its axis in the magnetic meridian and with its north pole pointing towards geographic south.
Answer» State the positions of neutral points when a magnet is placed with its axis in the magnetic meridian and with its north pole pointing towards geographic south.

Discussion

1840.	A particle is projected from ground with speed 80 m/s at an angle 30 degrees with horizontal from ground. The magnitude of the average velocity of particle in time interval t = 2s to t = 6s is (Take g=10/s Sq.)
Answer» A particle is projected from ground with speed 80 m/s at an angle 30 degrees with horizontal from ground. The magnitude of the average velocity of particle in time interval t = 2s to t = 6s is (Take g=10/s Sq.)

Discussion

1841.	Are only inverse square forces are central forces as nuclear force Which is not inverse square is non central
Answer» Are only inverse square forces are central forces as nuclear force Which is not inverse square is non central

Discussion

1842.	If an object experiences a net zero unbalanced force, then the body:
Answer» If an object experiences a net zero unbalanced force, then the body:

Discussion

1843.	ntWhy does the reaction moves towards denser direction If the pressure is increased??n
Answer» ntWhy does the reaction moves towards denser direction If the pressure is increased??n

Discussion

1844.	What do we mean by slope of a graph? What is its physical significance
Answer» What do we mean by slope of a graph? What is its physical significance

Discussion

1845.	Does the potential energy depends on the velocity of charge?
Answer» Does the potential energy depends on the velocity of charge?

Discussion

1846.	Rewrite the following sentences using proper alternative.a. The potential energy of your body is least when you are .....(i) sitting on a chair(ii) sitting on the ground(iii) sleeping on the ground(iv) standing on the groundb. The total energy of an object falling freely towards the ground ...(i) decreases(ii) remains unchanged(iii) increases(iv) increases in the beginning and then decreasesc. If we increase the velocity of a car moving on a flat surface to four times its original speed, its potential energy ....(i) will be twice its original energy(ii) will not change(iii) will be 4 times its original energy(iv) will be 16 times its original energy.d. The work done on an object does not depend on ....(i) displacement(ii) applied force(iii) initial velocity of the object(iv) the angle between force and displacement.
Answer» Rewrite the following sentences using proper alternative. a. The potential energy of your body is least when you are ..... (i) sitting on a chair (ii) sitting on the ground (iii) sleeping on the ground (iv) standing on the ground b. The total energy of an object falling freely towards the ground ... (i) decreases (ii) remains unchanged (iii) increases (iv) increases in the beginning and then decreases c. If we increase the velocity of a car moving on a flat surface to four times its original speed, its potential energy .... (i) will be twice its original energy (ii) will not change (iii) will be 4 times its original energy (iv) will be 16 times its original energy. d. The work done on an object does not depend on .... (i) displacement (ii) applied force (iii) initial velocity of the object (iv) the angle between force and displacement.

Discussion

1847.	Why does the frequency of sound differ when an open organ pipe is rotated holding it's one end?
Answer» Why does the frequency of sound differ when an open organ pipe is rotated holding it's one end?

Discussion

1848.	55. speed of sound in a gas is v and root mean square velocity of a gas molecule is C the ratio of v to c is
Answer» 55. speed of sound in a gas is v and root mean square velocity of a gas molecule is C the ratio of v to c is

Discussion

1849.	In damped oscillations, the amplitude of oscillations is reduced to half of its initial value of {5cm at the end of 25 oscillations. What will be its amplitude when the oscillator completes {50 oscillations?
Answer» In damped oscillations, the amplitude of oscillations is reduced to half of its initial value of {5cm at the end of 25 oscillations. What will be its amplitude when the oscillator completes {50 oscillations?

Discussion

1850.	What is a scalar field?
Answer» What is a scalar field?

Discussion

Explore topic-wise InterviewSolutions in .

What is mass

A ball is projected from a certain point on the surface of a planet at a certain angle with the horizontal surface The horizontal and vertical displacement x and y vary with time t in seconds v as : X = 10*3^1/2 t Y = 10t-t^2 The maximum height by ball is?.

What should be the position of the object in front of a concave mirror so that a virtual and magnified image is observed?

State two applications of the universal law of gravitation.

The acceleration due to gravity on Earth does not depend upon

Question 3Abdul, while driving to school, computes the average speed for his trip to be 20 kmph. On his return trip along the same route, there is less traffic and the average speed is 40 kmph. What is the average speed for Abdul’s trip?

Give scientific reasons;(1) The ships entering fresh water from sea water sink to a greater extent.(2) The cutting edges of tools like knives, blades etc are provided with sharp edges.

A particle moving along x axis as x=⅓t^3 +2t^2-32t+4 the accerlation of particle is when its velocity becomes zero

A particle is dropped from the surface of earth, then find its velocity when it reaches at the centre of the earth.

List the measures that you will take when designing a sound-proof room.

What are the characteristics of liquid pressure?

the velocity of a moving particle is given by v=\sqrt{4x} if at t=0 particle is at x=0, then velocity and acceleration at t=2

why is acceleration due to gravity taken as -9.8 even for downward motion

A barometer kept in an elevator accelerating upward reads 76 cm. The air pressure in the elevator is

A beam of light is converging towards a point I on a screen. A plane glass plate whose thickness in the direction of the beam = t, refractive index =μ , is introduced in the path of the beam. The convergence point is shifted by

Who applies the the centripetal force

ntan athlete takes 100g of glucose of energy equivalent to 1560 KJ. how much amount of energy is uptaken by 1g molecule of glucosen

A hollow sphere which has a small hole in its bottom is immersed in water to a depth of 30 cm beforeany water enters in it. If the surface tension of water is 75 dynes/cm then find the radius of the hole inmetres (taking g-10 m/s?)

An engine pumps a fluid of density 800kg/m3 through a tube of regular cross-sectional area of 5cm2 with a speed of 20cm/s. The rate at which kinetic energy is given to the fluid is

A force, when applied on a body, can

Three objects A, B, and C are in a liquid, as shown. Arrange them in the correct order of density, from the lowest to the highest.

Which of the following needs to be constant for Charles' law?

A tarin travels with a speed of 60 m h−1 from station A and station B and then comes back with a speed 80 m h−1 from station B to station A.Find:(i) the average speed, and (ii) the velocity of train.

In a 3− stage air compressor, the inlet pressure is p1, discharge pressure is p4 and the intermediate pressures are p2 and p3(p2&lt;p3). The total pressure ratio of the compressor is 10 and the pressure ratios of the stages are equal. If p1=100kPa, the value of the pressure p3 (in kPa) is464.16

Q.Ifa hole is made at the centre of a bar magnet then its magnetic moment will be (1)decrease (2)increase (3)unchange(4)ay increase or decrease

How can we identify that an object is in motion?

A bicycle increases its velocity from 10km/h to 15km/h in 6 seconds. Calculate its acceleration.

A rectangular block is 10 cm x 10 cm x 15 cm insize is floating in water with 10 cm side vertical. Ifitfloats with 15 cm side vertical, then the level of waterwill(1) Rise(2) Fall(3) Remain same(4) Change according to density of block

Consider two blocks of masses m1 and m2 placed in contact with each other on a friction less horizontal surface. Let a force F be applied on block of mass m1, then the value of contact force between the blocks is

A car travelling with a constant speed of 24 msalong South to North direction crosses a intersectionat time t 0. Another car moving with speed of30 msalong West to East direction crosses theintersection at t = 5 s. The displacement betweenthem at t 2 second is

Which part of the solar cooker is responsible for greenhouse-like effect?

A crane lifts a block of mass 1000 Kg through a vertical height of 15 m in 25 sec. Calculate the power of crane. Given g = 10 m/s2.

Complete the following : (a) 1 nano second = ..............................S. (b) 1μs =................................S. (c) 1 mean solar day = ................................S. (d) 1 year =.................................S.

What is the power of a pump which takes 10 seconds to lift 100 kg of water to a water tank situated at a height of 20 m? (g=10 ms−2) [2 MARKS]

Action and Reaction always act on two different bodies and always occur in pair. What is the meaning of this statement?

Q. An object of mass 80 kg moving with velocity 2metre per second hit by collides with another object of masss 20 kg moving with velocity 4 metre per second . Find the loss of energy assuming a perfectly inelastic collision.

State the positions of neutral points when a magnet is placed with its axis in the magnetic meridian and with its north pole pointing towards geographic south.

A particle is projected from ground with speed 80 m/s at an angle 30 degrees with horizontal from ground. The magnitude of the average velocity of particle in time interval t = 2s to t = 6s is (Take g=10/s Sq.)

Are only inverse square forces are central forces as nuclear force Which is not inverse square is non central

If an object experiences a net zero unbalanced force, then the body:

ntWhy does the reaction moves towards denser direction If the pressure is increased??n

What do we mean by slope of a graph? What is its physical significance

Does the potential energy depends on the velocity of charge?

Why does the frequency of sound differ when an open organ pipe is rotated holding it's one end?

55. speed of sound in a gas is v and root mean square velocity of a gas molecule is C the ratio of v to c is

In damped oscillations, the amplitude of oscillations is reduced to half of its initial value of {5cm at the end of 25 oscillations. What will be its amplitude when the oscillator completes {50 oscillations?

What is a scalar field?

In a 3− stage air compressor, the inlet pressure is p1, discharge pressure is p4 and the intermediate pressures are p2 and p3(p2<p3). The total pressure ratio of the compressor is 10 and the pressure ratios of the stages are equal. If p1=100kPa, the value of the pressure p3 (in kPa) is464.16