13232 + Interview Questions in Physics Page 259 InterviewSolution

12901.	Which of the following could not be a unit of acceleration ? (a) km/s2 (b) cm/s2 (c) km/s (d) m/s2
Answer» Which of the following could not be a unit of acceleration ? (a) $k m / s^{2}$ (b) $c m / s^{2}$ (c) km/s (d) $m / s^{2}$

12901.

Which of the following could not be a unit of acceleration ? (a) km/s2 (b) cm/s2 (c) km/s (d) m/s2

Answer»

Which of the following could not be a unit of acceleration ?

(a) $k m / s^{2}$ (b) $c m / s^{2}$ (c) km/s (d) $m / s^{2}$

Discussion

12902.	Answer the following : (i) Can sound travel in vacuum ? (ii) How does the speed of sound differ in different media ?
Answer» Answer the following : (i) Can sound travel in vacuum ? (ii) How does the speed of sound differ in different media ?

12902.

Answer the following : (i) Can sound travel in vacuum ? (ii) How does the speed of sound differ in different media ?

Answer»

Answer the following :

(i) Can sound travel in vacuum ?

(ii) How does the speed of sound differ in different media ?

Discussion

12903.	Following table gives the displacement of a car at different instants of time. Time (s)01234Displacement (m)05101520 (a) Draw the displacement-time sketch and find the average velocity of car. (b) What will be the displacement of car at (i) 2.5 s and (ii) 4.5 s ?
Answer» Following table gives the displacement of a car at different instants of time. $\begin{matrix} T i m e (s) & 0 & 1 & 2 & 3 & 4 D i s p l a c e m e n t (m) & 0 & 5 & 10 & 15 & 20 \end{matrix}$ (a) Draw the displacement-time sketch and find the average velocity of car. (b) What will be the displacement of car at (i) 2.5 s and (ii) 4.5 s ?

12903.

Following table gives the displacement of a car at different instants of time. Time (s)01234Displacement (m)05101520 (a) Draw the displacement-time sketch and find the average velocity of car. (b) What will be the displacement of car at (i) 2.5 s and (ii) 4.5 s ?

Answer»

Following table gives the displacement of a car at different instants of time.

$\begin{matrix} T i m e (s) & 0 & 1 & 2 & 3 & 4 D i s p l a c e m e n t (m) & 0 & 5 & 10 & 15 & 20 \end{matrix}$

(a) Draw the displacement-time sketch and find the average velocity of car.

(b) What will be the displacement of car at

(i) 2.5 s and (ii) 4.5 s ?

Discussion

12904.	Define acceleration.State its S.I.Unit.
Answer» Define acceleration.State its S.I.Unit.

Discussion

12905.	How to plot time vs velocity graph and time vs displacement graph?
Answer» How to plot time vs velocity graph and time vs displacement graph?

Discussion

12906.	What is the nature of sound waves in air ?
Answer» What is the nature of sound waves in air ?

Discussion

12907.	How many magnitude in 1 Newton
Answer» How many magnitude in 1 Newton

Discussion

12908.	what is oscilation and oscillatory motion
Answer» what is oscilation and oscillatory motion

Discussion

12909.	What happen when air pump in 🎈 . Why it bust after sometime when we fill air . What is relationship between pressure and mass.
Answer» What happen when air pump in 🎈 . Why it bust after sometime when we fill air . What is relationship between pressure and mass.

Discussion

12910.	If force is applied, there will be always kinetic energy generated. Is that true?
Answer» If force is applied, there will be always kinetic energy generated. Is that true?

Discussion

12911.	Particle is moving in a circular path of radius r. What would be the distance travelled and displacement after completing half a circle
Answer» Particle is moving in a circular path of radius r. What would be the distance travelled and displacement after completing half a circle

Discussion

12912.	Explain how a karate player can break a pile of tiles with a single blow of his hand
Answer» Explain how a karate player can break a pile of tiles with a single blow of his hand

Discussion

12913.	The speed of rotational movement of the earth at the equator is about –
Answer» The speed of rotational movement of the earth at the equator is about –

Discussion

12914.	When we throw an apple upwards, then it comes back to the ground. But why doesn't the moon come down towards the earth?
Answer» When we throw an apple upwards, then it comes back to the ground. But why doesn't the moon come down towards the earth?

Discussion

12915.	A force F is given by F=at + bt2 , where t is time. What are the dimensions of a and b
Answer» A force F is given by F=at + $b t^{2}$ , where t is time. What are the dimensions of a and b

Discussion

12916.	Which force is responsible for the moon revolving round the earth ?
Answer» Which force is responsible for the moon revolving round the earth ?

Discussion

12917.	Can a moving body have a zero speed?
Answer» Can a moving body have a zero speed?

Discussion

12918.	A bus decreases its speed from 100 km/h to 80 km/h in 5 s. Find the acceleration of the bus.
Answer» A bus decreases its speed from 100 km/h to 80 km/h in 5 s. Find the acceleration of the bus.

Discussion

12919.	Are we in motion or at rest?
Answer» Are we in motion or at rest?

Discussion

12920.	Give one example each in which a force does (a) positive work (b) negative work, and (c) zero work.
Answer» Give one example each in which a force does (a) positive work (b) negative work, and (c) zero work.

Discussion

12921.	State two units of mass smaller than a kilogram. How are they related to the kilogram ?
Answer» State two units of mass smaller than a kilogram. How are they related to the kilogram ?

Discussion

12922.	A bullet of mass 15 g has a speed of 400 m/s. What is its kinetic energy ? If the bullet strikes a thick target and is bought to rest in 2 cm, calculate the average net force acting on the bullet. What happens to the kinetic energy originally in the bullet ?
Answer» A bullet of mass 15 g has a speed of 400 m/s. What is its kinetic energy ? If the bullet strikes a thick target and is bought to rest in 2 cm, calculate the average net force acting on the bullet. What happens to the kinetic energy originally in the bullet ?

Discussion

12923.	Why there is no change in water level on melting a floating piece of ice
Answer» Why there is no change in water level on melting a floating piece of ice

Discussion

12924.	Suppose a ball of mass m is thrown vertically upwar with an initial speed v, its speed decreases continuously till it becomes zero . Thereafter , the ball begins to fall downwardand attains the speed v again before striking the ground . It implies that the magnitude of initial and final momentums of the ball are same . Yet , it is not an example of conservation of momentum . Explain why ?
Answer» Suppose a ball of mass m is thrown vertically upwar with an initial speed v, its speed decreases continuously till it becomes zero . Thereafter , the ball begins to fall downwardand attains the speed v again before striking the ground . It implies that the magnitude of initial and final momentums of the ball are same . Yet , it is not an example of conservation of momentum . Explain why ?

Discussion

12925.	What do you mean by dead zones?
Answer» What do you mean by dead zones?

Discussion

12926.	Match the lung capacities in Column A with the quantities in Column B ColumnAColumnBi.Deadairspacea.6000mLii.Tidalvolumeb.3500mLiii.Inspiratorycapacityc.500mLiv.Totallungcapacityd.150mL
Answer» Match the lung capacities in Column A with the quantities in Column B $\begin{matrix} C o l u m n A & C o l u m n B i . D e a d a i r s p a c e & a . 6000 m L i i . T i d a l v o l u m e & b . 3500 m L i i i . I n s p i r a t o r y c a p a c i t y & c . 500 m L i v . T o t a l l u n g c a p a c i t y & d . 150 m L \end{matrix}$

12926.

Match the lung capacities in Column A with the quantities in Column B ColumnAColumnBi.Deadairspacea.6000mLii.Tidalvolumeb.3500mLiii.Inspiratorycapacityc.500mLiv.Totallungcapacityd.150mL

Answer»

Match the lung capacities in Column A with the quantities in Column B

$\begin{matrix} C o l u m n A & C o l u m n B i . D e a d a i r s p a c e & a . 6000 m L i i . T i d a l v o l u m e & b . 3500 m L i i i . I n s p i r a t o r y c a p a c i t y & c . 500 m L i v . T o t a l l u n g c a p a c i t y & d . 150 m L \end{matrix}$

Discussion

12927.	Why u change direction in uniform motion? Can the X axis have a dependable quantity and Y axis have a independent quantity?
Answer» Why u change direction in uniform motion? Can the X axis have a dependable quantity and Y axis have a independent quantity?

12927.

Why u change direction in uniform motion? Can the X axis have a dependable quantity and Y axis have a independent quantity?

Answer»

Why u change direction in uniform motion?

Can the X axis have a dependable quantity and Y axis have a independent quantity?

Discussion

12928.	Define the term 'Vernier constant'.
Answer» Define the term 'Vernier constant'.

Discussion

12929.	If x = 1 + y + y2 . . . . . ∞, \|y\|<1, then y is
Answer» If x = 1 + y + $y^{2}$ . . . . . $\infty$ , \|y\|<1, then y is

Discussion

12930.	Give two reasons for the use of mercury as a barometric liquid.
Answer» Give two reasons for the use of mercury as a barometric liquid.

Discussion

12931.	___ Pa is the pressure at a depth of 10m below the surface of the kerosene. The density of kerosene is 800kgm3.
Answer» ___ $P a$ is the pressure at a depth of $10 m$ below the surface of the kerosene. The density of kerosene is $800 \frac{k g}{m^{3}}$ .

Discussion

12932.	A water tanker filled up to two-thirds of its height is moving with a uniform speed. On sudden application of brake, the water in the tank will __________.
Answer» A water tanker filled up to two-thirds of its height is moving with a uniform speed. On sudden application of brake, the water in the tank will __________.

Discussion

12933.	The volume of an air bubble becomes three times as it rises from the bottom of a lake to its surface. Assuming atmospheric pressure to be 75 cm of Hg and the density of water to be 1/10 of the density of mercury, the depth of the lake is
Answer» The volume of an air bubble becomes three times as it rises from the bottom of a lake to its surface. Assuming atmospheric pressure to be 75 cm of Hg and the density of water to be 1/10 of the density of mercury, the depth of the lake is

12933.

The volume of an air bubble becomes three times as it rises from the bottom of a lake to its surface. Assuming atmospheric pressure to be 75 cm of Hg and the density of water to be 1/10 of the density of mercury, the depth of the lake is

Answer»

The volume of an air bubble becomes three times as it rises from the bottom of a lake to its surface. Assuming atmospheric pressure to be 75 cm of Hg and the density of water to be 1/10 of the density of mercury, the depth of the lake is

Discussion

12934.	A body of mass m is moving with a uniform velocity u. A force is applied to the body due to which its velocity increases from u to v. How much work is being done by the force?
Answer» A body of mass m is moving with a uniform velocity u. A force is applied to the body due to which its velocity increases from u to v. How much work is being done by the force?

Discussion

12935.	Explain the meaning of the term 'least count of an instrument' by taking a suitable example.
Answer» Explain the meaning of the term 'least count of an instrument' by taking a suitable example.

Discussion

12936.	A block of volume 4 cc is immersed twice in a beaker containing a liquid. The first time the beaker was filled with water whereas the second time it was filled with salt solution. In which case will it experience a greater buoyant force?
Answer» A block of volume 4 cc is immersed twice in a beaker containing a liquid. The first time the beaker was filled with water whereas the second time it was filled with salt solution. In which case will it experience a greater buoyant force?

12936.

A block of volume 4 cc is immersed twice in a beaker containing a liquid. The first time the beaker was filled with water whereas the second time it was filled with salt solution. In which case will it experience a greater buoyant force?

Answer»

A block of volume 4 cc is immersed twice in a beaker containing a liquid. The first time the beaker was filled with water whereas the second time it was filled with salt solution. In which case will it experience a greater buoyant force?

Discussion

12937.	Calculate the pressure due to a water column of height 120 m. (Take g=10ms−2 and density of water =103 kg m−3)
Answer» Calculate the pressure due to a water column of height 120 m. (Take $g = 10 m s^{- 2}$ and density of water $= 103 k g m^{- 3}$ )

Discussion

12938.	If a ringing bicycle bell is held tightly by hand, it stops producing sound. Why?
Answer» If a ringing bicycle bell is held tightly by hand, it stops producing sound. Why?

Discussion

12939.	A metallic wire of resistance R is melted and recast to half of its original length while maintaining the original volume. What will the new resistance of the wire be?
Answer» A metallic wire of resistance R is melted and recast to half of its original length while maintaining the original volume. What will the new resistance of the wire be?

Discussion

12940.	The speed of sound on a hot summer day will be _____ than the speed of sound on a cold winter day.
Answer» The speed of sound on a hot summer day will be _____ than the speed of sound on a cold winter day.

Discussion

12941.	A given mass of water is cooled from 10∘C to 0∘C. State the volume changes observed. Represent these changes on a temperature - volume graph.
Answer» A given mass of water is cooled from $10^{\circ} C t o 0^{\circ} C$ . State the volume changes observed. Represent these changes on a temperature - volume graph.

Discussion

12942.	A force 'F' is continuously applied to a block that is lying on a horizontal surface. The block starts moving soon after the force is applied. The static friction was 'St' and the sliding friction was 'Sl'. What is the net force acting on the block once it has started moving? (A) F (B) F-St (C) F-St-Sl (D) F-Sl
Answer» A force 'F' is continuously applied to a block that is lying on a horizontal surface. The block starts moving soon after the force is applied. The static friction was 'St' and the sliding friction was 'Sl'. What is the net force acting on the block once it has started moving? (A) F (B) F-St (C) F-St-Sl (D) F-Sl

12942.

A force 'F' is continuously applied to a block that is lying on a horizontal surface. The block starts moving soon after the force is applied. The static friction was 'St' and the sliding friction was 'Sl'. What is the net force acting on the block once it has started moving? (A) F (B) F-St (C) F-St-Sl (D) F-Sl

Answer»

A force 'F' is continuously applied to a block that is lying on a horizontal surface. The block starts moving soon after the force is applied. The static friction was 'St' and the sliding friction was 'Sl'. What is the net force acting on the block once it has started moving?

(A) F

(B) F-St

(C) F-St-Sl

(D) F-Sl

Discussion

12943.	SI unit of Inertia
Answer» SI unit of Inertia

Discussion

12944.	Why makes earth to rotate on its axis
Answer» Why makes earth to rotate on its axis

Discussion

12945.	Do the sonic boom has very high frequency ?
Answer» Do the sonic boom has very high frequency ?

Discussion

12946.	The three equations of motion how we can understand that where we have to use the three equations of motion to solve the questions and how we can understand that there we have to use 1eq,2 eq or 3eq?
Answer» The three equations of motion how we can understand that where we have to use the three equations of motion to solve the questions and how we can understand that there we have to use 1eq,2 eq or 3eq?

Discussion

12947.	Find the value of ‘I′ for the following circuit.
Answer» Find the value of $‘ I^{'}$ for the following circuit.

Discussion

12948.	Which of the following options is/are related to acceleration?
Answer» Which of the following options is/are related to acceleration?

Discussion

12949.	A hydrogen balloon rises in air because :
Answer» A hydrogen balloon rises in air because :

Discussion

12950.	Why gold is not weighed by a spring balance
Answer» Why gold is not weighed by a spring balance

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following could not be a unit of acceleration ? (a) km/s2 (b) cm/s2 (c) km/s (d) m/s2

Answer the following : (i) Can sound travel in vacuum ? (ii) How does the speed of sound differ in different media ?

Following table gives the displacement of a car at different instants of time. Time (s)01234Displacement (m)05101520 (a) Draw the displacement-time sketch and find the average velocity of car. (b) What will be the displacement of car at (i) 2.5 s and (ii) 4.5 s ?

Define acceleration.State its S.I.Unit.

How to plot time vs velocity graph and time vs displacement graph?

What is the nature of sound waves in air ?

How many magnitude in 1 Newton

what is oscilation and oscillatory motion

What happen when air pump in 🎈 . Why it bust after sometime when we fill air . What is relationship between pressure and mass.

If force is applied, there will be always kinetic energy generated. Is that true?

Particle is moving in a circular path of radius r. What would be the distance travelled and displacement after completing half a circle

Explain how a karate player can break a pile of tiles with a single blow of his hand

The speed of rotational movement of the earth at the equator is about –

When we throw an apple upwards, then it comes back to the ground. But why doesn't the moon come down towards the earth?

A force F is given by F=at + bt2 , where t is time. What are the dimensions of a and b

Which force is responsible for the moon revolving round the earth ?

Can a moving body have a zero speed?

A bus decreases its speed from 100 km/h to 80 km/h in 5 s. Find the acceleration of the bus.

Are we in motion or at rest?

Give one example each in which a force does (a) positive work (b) negative work, and (c) zero work.

State two units of mass smaller than a kilogram. How are they related to the kilogram ?

A bullet of mass 15 g has a speed of 400 m/s. What is its kinetic energy ? If the bullet strikes a thick target and is bought to rest in 2 cm, calculate the average net force acting on the bullet. What happens to the kinetic energy originally in the bullet ?

Why there is no change in water level on melting a floating piece of ice

What do you mean by dead zones?

Match the lung capacities in Column A with the quantities in Column B ColumnAColumnBi.Deadairspacea.6000mLii.Tidalvolumeb.3500mLiii.Inspiratorycapacityc.500mLiv.Totallungcapacityd.150mL

Why u change direction in uniform motion? Can the X axis have a dependable quantity and Y axis have a independent quantity?

Define the term 'Vernier constant'.

If x = 1 + y + y2 . . . . . ∞, |y|&lt;1, then y is

Give two reasons for the use of mercury as a barometric liquid.

___ Pa is the pressure at a depth of 10m below the surface of the kerosene. The density of kerosene is 800kgm3.

A water tanker filled up to two-thirds of its height is moving with a uniform speed. On sudden application of brake, the water in the tank will __________.

The volume of an air bubble becomes three times as it rises from the bottom of a lake to its surface. Assuming atmospheric pressure to be 75 cm of Hg and the density of water to be 1/10 of the density of mercury, the depth of the lake is

A body of mass m is moving with a uniform velocity u. A force is applied to the body due to which its velocity increases from u to v. How much work is being done by the force?

Explain the meaning of the term 'least count of an instrument' by taking a suitable example.

A block of volume 4 cc is immersed twice in a beaker containing a liquid. The first time the beaker was filled with water whereas the second time it was filled with salt solution. In which case will it experience a greater buoyant force?

Calculate the pressure due to a water column of height 120 m. (Take g=10ms−2 and density of water =103 kg m−3)

If a ringing bicycle bell is held tightly by hand, it stops producing sound. Why?

A metallic wire of resistance R is melted and recast to half of its original length while maintaining the original volume. What will the new resistance of the wire be?

The speed of sound on a hot summer day will be _____ than the speed of sound on a cold winter day.

A given mass of water is cooled from 10∘C to 0∘C. State the volume changes observed. Represent these changes on a temperature - volume graph.

SI unit of Inertia

Why makes earth to rotate on its axis

Do the sonic boom has very high frequency ?

The three equations of motion how we can understand that where we have to use the three equations of motion to solve the questions and how we can understand that there we have to use 1eq,2 eq or 3eq?

Find the value of ‘I′ for the following circuit.

Which of the following options is/are related to acceleration?

A hydrogen balloon rises in air because :

Why gold is not weighed by a spring balance

If x = 1 + y + y2 . . . . . ∞, |y|<1, then y is