13232 + Interview Questions in Physics Page 68 InterviewSolution

3351.	A mass of a body is 70 kg. When completely immersed in water it displaces 2000 cm3 of water. What is the relative density of the material of the body?
Answer» A mass of a body is 70 kg. When completely immersed in water it displaces 2000 cm3 of water. What is the relative density of the material of the body?

Discussion

3352.	explain the graph between loudness and intensity of sound
Answer» explain the graph between loudness and intensity of sound

Discussion

3353.	A body of mass 5 kg has a velocity of 20 metres per second. Its momentum is .
Answer» A body of mass 5 kg has a velocity of 20 metres per second. Its momentum is .

Discussion

3354.	Explain how Corpuscular theory predicts the speed of light in amedium, say, water, to be greater than the speed of light in vacuum.Is the prediction confirmed by experimental determination of thespeed of light in water? If not, which alternative picture of light isconsistent with experiment?
Answer» Explain how Corpuscular theory predicts the speed of light in amedium, say, water, to be greater than the speed of light in vacuum.Is the prediction confirmed by experimental determination of thespeed of light in water? If not, which alternative picture of light isconsistent with experiment?

Discussion

3355.	Q.11> Is steady current the onlysource of magnetic field. Explain with reference to Ampere's law
Answer» Q.11> Is steady current the onlysource of magnetic field. Explain with reference to Ampere's law

Discussion

3356.	The density of a material in C.G.S system is 4g/cm^3.In a system in which unit of l=10 cm,M =1000g .the value of density of material will be?
Answer» The density of a material in C.G.S system is 4g/cm^3.In a system in which unit of l=10 cm,M =1000g .the value of density of material will be?

Discussion

3357.	10. A uniform sphere is placed on a smooth horizontalsurface and a horizontal force Fis applied on it at adistance h above the surface. The acceleration of thecentre(a) is maximum when h =0(b) is maximum when h R(c) is maximum when h=2R(d) is independent of h.
Answer» 10. A uniform sphere is placed on a smooth horizontalsurface and a horizontal force Fis applied on it at adistance h above the surface. The acceleration of thecentre(a) is maximum when h =0(b) is maximum when h R(c) is maximum when h=2R(d) is independent of h.

Discussion

3358.	a rectangular tank 10m long,5 m broad and 3m high.It is filled to the rim with water of density 10^kg/m^3. calculate thrust at the bottom and walls of tank due to hydrostatic pressure
Answer» a rectangular tank 10m long,5 m broad and 3m high.It is filled to the rim with water of density 10^kg/m^3. calculate thrust at the bottom and walls of tank due to hydrostatic pressure

Discussion

3359.	If a man weighs 70 kg what will his weight be on moon?
Answer» If a man weighs 70 kg what will his weight be on moon?

Discussion

3360.	Why field lines are perpendicular to the surface of the conductor?
Answer» Why field lines are perpendicular to the surface of the conductor?

Discussion

3361.	Initially a car is moving with speed of 20 ms^-1 and covers a distance of 100 m before it comes to rest. On making the initial speed of car is 40 ms^-1 keeping the acceleration same, the distance travelled by car before it comes to rest is
Answer» Initially a car is moving with speed of 20 ms^-1 and covers a distance of 100 m before it comes to rest. On making the initial speed of car is 40 ms^-1 keeping the acceleration same, the distance travelled by car before it comes to rest is

Discussion

3362.	A bullet of mass 100 g has attained a velocity of 1080 km h−1 towards the target. What would its kinetic energy be at that moment?
Answer» A bullet of mass $100 g$ has attained a velocity of $1080 k m h^{- 1}$ towards the target. What would its kinetic energy be at that moment?

Discussion

3363.	Two batteries, one of emf 18 volts and internal resistance 2 Ω and the other of emf 12 volts and internal resistance 1 Ω, are connected as shown. The reading of the voltmeter V will be:
Answer» Two batteries, one of emf $18 volts$ and internal resistance $2 Ω$ and the other of emf $12 volts$ and internal resistance $1 Ω$ , are connected as shown. The reading of the voltmeter $V$ will be:

Discussion

3364.	Vijay is pulling a block with 22 N force and Gopal is pulling it with 10 N force in opposite direction. Vijay is able to pull the block upto total distance 6.5 m. Find the net work done.
Answer» Vijay is pulling a block with 22 N force and Gopal is pulling it with 10 N force in opposite direction. Vijay is able to pull the block upto total distance 6.5 m. Find the net work done.

Discussion

3365.	A cricket ball is droped from a height of 20 metres. calculate the speed of the ball when it hits the ground. IN THIS QUESTION CAN WE TAKE FINAL VELOCITY,DISPLCEMENT S AND ACCELERATION DUE TO GRAVITY AS NEGATIVE?
Answer» A cricket ball is droped from a height of 20 metres. calculate the speed of the ball when it hits the ground. IN THIS QUESTION CAN WE TAKE FINAL VELOCITY,DISPLCEMENT S AND ACCELERATION DUE TO GRAVITY AS NEGATIVE?

Discussion

3366.	How much heat must be absorbed by 525 grams of water to raise its temperature by 45° C?
Answer» How much heat must be absorbed by 525 grams of water to raise its temperature by 45° C?

Discussion

3367.	The value of the universal gravitational constant is .
Answer» The value of the universal gravitational constant is .

Discussion

3368.	What is the speed of sound
Answer» What is the speed of sound

Discussion

3369.	Figure below shows the distance-time graph of three objects A, B and C. Find the speed of all the three bodies. Which of the following three is travelling the fastest? [3 MARKS]
Answer» Figure below shows the distance-time graph of three objects A, B and C. Find the speed of all the three bodies. Which of the following three is travelling the fastest? [3 MARKS]

3369.

Figure below shows the distance-time graph of three objects A, B and C. Find the speed of all the three bodies. Which of the following three is travelling the fastest? [3 MARKS]

Answer»

Figure below shows the distance-time graph of three objects A, B and C. Find the speed of all the three bodies. Which of the following three is travelling the fastest? [3 MARKS]

Discussion

3370.	4. The electrical potential at a point (x, y, z) is givenby V = –x2y – xz3 + 4The electric field E-at that point is(1) ( ) 32 2 E xy z i x j xz k = + ++ 2 3 ˆˆ ˆ -(2) ( )( ) 22 2 E xyi x y j xz y k = ++ + − 2 3 ˆˆ ˆ -(3) 3 2 E z i xyzj k =+ + ˆ ˆˆ 3 -(4) ( ) 3 22 E xy z i xy j z xk = −+ + 2 3 ˆˆ ˆ
Answer» 4. The electrical potential at a point (x, y, z) is given by V = –x2y – xz3 + 4 The electric field E - at that point is (1) ( ) 32 2 E xy z i x j xz k = + ++ 2 3 ˆˆ ˆ - (2) ( )( ) 22 2 E xyi x y j xz y k = ++ + − 2 3 ˆˆ ˆ - (3) 3 2 E z i xyzj k =+ + ˆ ˆˆ 3 - (4) ( ) 3 22 E xy z i xy j z xk = −+ + 2 3 ˆˆ ˆ

Discussion

3371.	A uniform cylinder of length L and mass M having cross - sectional area A is suspended, with its length vertical, from a fixed point by a massless spring such that it is half submerged in a liquid of density σ atequilibrium position. The extension x0 of the spring when it is in equilibrium is :
Answer» A uniform cylinder of length $L$ and mass $M$ having cross - sectional area $A$ is suspended, with its length vertical, from a fixed point by a massless spring such that it is half submerged in a liquid of density $σ$ at equilibrium position. The extension $x_{0}$ of the spring when it is in equilibrium is :

Discussion

3372.

bride cart kite chance ride dance side fast sky part Do you know more words with these sounds?

Answer»

bride	cart
kite	chance
ride	dance
side	fast
sky	part

Do you know more words with these sounds?

Discussion

3373.	at what height the accelaration due to gravity will be reduced to 36% of its value on the surface of the earth
Answer» at what height the accelaration due to gravity will be reduced to 36% of its value on the surface of the earth

Discussion

3374.	Define:(a) Atom(b) Orbit(c) Atomic number(d) Atomic Mass number.
Answer» Define: (a) Atom (b) Orbit (c) Atomic number (d) Atomic Mass number.

3374.

Define:(a) Atom(b) Orbit(c) Atomic number(d) Atomic Mass number.

Answer»

Define:

(a) Atom

(b) Orbit

(c) Atomic number

(d) Atomic Mass number.

Discussion

3375.	Which of the following mirror has the highest field of view?
Answer» Which of the following mirror has the highest field of view?

Discussion

3376.	The expression for acceleration due to gravity (g) near the surface of a planet of mass (M) and radius (r) is: G: Gravitational constant
Answer» The expression for acceleration due to gravity $(g)$ near the surface of a planet of mass $(M)$ and radius $(r)$ is: G: Gravitational constant

Discussion

3377.	Why it is difficult for a fireman to hold a hose, which ejects water at a high velocity ? Explain. [3 MARKS]
Answer» Why it is difficult for a fireman to hold a hose, which ejects water at a high velocity ? Explain. [3 MARKS]

Discussion

3378.	A refrigerator works between 4C and 30C. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is [Take 1 cal = 4.2 J)
Answer» A refrigerator works between 4C and 30C. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is [Take 1 cal = 4.2 J)

Discussion

3379.	A hydraulic lift has two pistons, the larger cross-sectional area is 40 times the smaller cross-sectional area. If an input force of 25 N is applied on the smaller cross-section, then the output force is
Answer» A hydraulic lift has two pistons, the larger cross-sectional area is 40 times the smaller cross-sectional area. If an input force of 25 N is applied on the smaller cross-section, then the output force is

Discussion

3380.	Newton's third law :
Answer» Newton's third law :

Discussion

3381.	53.The loop moves towards a region of magnetic field. Draw the graph of I(+ 've direction) and time. Speed of the coil is constant and equal to v
Answer» 53.The loop moves towards a region of magnetic field. Draw the graph of I(+ 've direction) and time. Speed of the coil is constant and equal to v

Discussion

3382.	A man of mass M stands at one end of a plank of length L which lies at rest on frictionless surface. The man walks on the other end of plank. If mass of plank is M/3 the distance man moves relative to the ground is L/4
Answer» A man of mass M stands at one end of a plank of length L which lies at rest on frictionless surface. The man walks on the other end of plank. If mass of plank is M/3 the distance man moves relative to the ground is L/4

Discussion

3383.	If a acceleration of a body is 6x what is the velocity
Answer» If a acceleration of a body is 6x what is the velocity

Discussion

3384.	What is the difference between electric field and electric field intensity?Are their formulae same or different?
Answer» What is the difference between electric field and electric field intensity?Are their formulae same or different?

Discussion

3385.	What is the work done to lift an object weighing 100 g to a height of 50 m from an initial height of 20 m? (Assume g =10 m s−2)
Answer» What is the work done to lift an object weighing 100 g to a height of 50 m from an initial height of 20 m? (Assume g =10 $m s^{- 2}$ )

Discussion

3386.	The given function represents the temperature changes over years in a particular place.Find the range of the function.
Answer» The given function represents the temperature changes over years in a particular place. Find the range of the function.

Discussion

3387.	Four students measured the reading by observing the position of pointer on the ammeter scale as shown below:Assuming that the ammeter has no zero error, the correct reading is :(1) 1.25 A(2) 1.30 A(3) 1.15 A(4) 1.1 A
Answer» Four students measured the reading by observing the position of pointer on the ammeter scale as shown below: Assuming that the ammeter has no zero error, the correct reading is : (1) 1.25 A (2) 1.30 A (3) 1.15 A (4) 1.1 A

Discussion

3388.	If the length of a pendulum is made 9 times and mass of the bob is made 4 times then the value of time period becomes
Answer» If the length of a pendulum is made 9 times and mass of the bob is made 4 times then the value of time period becomes

Discussion

3389.	A man in a hot air balloon, throws a stone downwards with a speed of 5 m/s with respect to the balloon. If the balloon is moving upwards with a constant acceleration of 5 m/s2, then the velocity of the stone relative to the man after 2 second is(Take g=10 m/s2)
Answer» A man in a hot air balloon, throws a stone downwards with a speed of $5 m/s$ with respect to the balloon. If the balloon is moving upwards with a constant acceleration of $5 {m/s}^{2}$ , then the velocity of the stone relative to the man after $2 second$ is (Take $g = 10 {m/s}^{2}$ )

Discussion

3390.	What are fossil fuels? Give examples.
Answer» What are fossil fuels? Give examples.

Discussion

3391.	Do action and reaction act on the same body or different bodies? How are they related in magnitude and direction? Are they simultaneous or not?
Answer» Do action and reaction act on the same body or different bodies? How are they related in magnitude and direction? Are they simultaneous or not?

Discussion

3392.	A 2000 kg car moving at 40km/h is to be stopped by applying brakes in next 4.0m. What average force force (in kN) must be applied on it? A)20 B)25 C)31 D)50
Answer» A 2000 kg car moving at 40km/h is to be stopped by applying brakes in next 4.0m. What average force force (in kN) must be applied on it? A)20 B)25 C)31 D)50

Discussion

3393.	For the graph given below choose the correct option. TableATableBa) Line Ai) Accelerated Motionb) Line Bii) Constant velocity(high magnitude)c) Curve Ciii) At restd) Line Eiv)Constant Velocity(low magnitude)
Answer» For the graph given below choose the correct option. $\begin{matrix} T a b l e A & T a b l e B a) Line A & i) Accelerated Motion b) Line B & i i) Constant velocity(high magnitude) c) Curve C & i i i) At rest d) Line E & i v) Constant Velocity(low magnitude) \end{matrix}$

3393.

For the graph given below choose the correct option. TableATableBa) Line Ai) Accelerated Motionb) Line Bii) Constant velocity(high magnitude)c) Curve Ciii) At restd) Line Eiv)Constant Velocity(low magnitude)

Answer»

For the graph given below choose the correct option.

$\begin{matrix} T a b l e A & T a b l e B a) Line A & i) Accelerated Motion b) Line B & i i) Constant velocity(high magnitude) c) Curve C & i i i) At rest d) Line E & i v) Constant Velocity(low magnitude) \end{matrix}$

Discussion

3394.	The distance of Venus from Sun is 1.082×1011m and its period of revolution is 244.633 days. If the period of revolution of the Earth around the Sun is 365.247 days, calculate its distance from the sun.
Answer» The distance of Venus from Sun is $1.082 \times 10^{11}$ m and its period of revolution is 244.633 days. If the period of revolution of the Earth around the Sun is 365.247 days, calculate its distance from the sun.

Discussion

3395.	A concave mirror is half dipped in water. Focal length of portion of mirror in the air is f_1 and focal length of mirror in water is f_2, then (Take refractive index of water=4/3) (1) f_1>f_2 (2) f_1
Answer» A concave mirror is half dipped in water. Focal length of portion of mirror in the air is f_1 and focal length of mirror in water is f_2, then (Take refractive index of water=4/3) (1) f_1>f_2 (2) f_1

Discussion

3396.	A steel column pinned at both ends has a bucking load of 160 kN. If the column is effectively held in position and restrained against rotation at one end but neither held in position nor restrained against rotation at the other end, then its bucking load will be kN.40
Answer» A steel column pinned at both ends has a bucking load of 160 kN. If the column is effectively held in position and restrained against rotation at one end but neither held in position nor restrained against rotation at the other end, then its bucking load will be kN. 40

3396.

A steel column pinned at both ends has a bucking load of 160 kN. If the column is effectively held in position and restrained against rotation at one end but neither held in position nor restrained against rotation at the other end, then its bucking load will be kN.40

Answer»

A steel column pinned at both ends has a bucking load of 160 kN. If the column is effectively held in position and restrained against rotation at one end but neither held in position nor restrained against rotation at the other end, then its bucking load will be kN.

40

Discussion

3397.	Why do we feel a lot more heavier than before when we come out of a swimming pool
Answer» Why do we feel a lot more heavier than before when we come out of a swimming pool

Discussion

3398.	A metal ball of mass 200 g falls from a height of 5 m and hits a slab kept on the ground. If all the kinetic energy of the ball was imparted to the slab as heat energy, what is the rise in temperature of the slab? (Mass of slab : 5 kg, Specific heat capacity of slab = 2 J/kg∘C, g=10 m/s2)
Answer» A metal ball of mass 200 g falls from a height of 5 m and hits a slab kept on the ground. If all the kinetic energy of the ball was imparted to the slab as heat energy, what is the rise in temperature of the slab? (Mass of slab : 5 kg, Specific heat capacity of slab = $2 J / k g^{\circ} C, g = 10 m / s^{2}$ )

Discussion

3399.	A ball is thrown in air and falls down while moving in a curve path then the work down is ??? If no then explain 😇😇😇
Answer» A ball is thrown in air and falls down while moving in a curve path then the work down is ??? If no then explain 😇😇😇

Discussion

3400.	Question 6What are the limitations of extracting energy from -(a) the wind? (b) Waves? (c) Tides?
Answer» Question 6 What are the limitations of extracting energy from - (a) the wind? (b) Waves? (c) Tides?

Discussion

Explore topic-wise InterviewSolutions in .

A mass of a body is 70 kg. When completely immersed in water it displaces 2000 cm3 of water. What is the relative density of the material of the body?

explain the graph between loudness and intensity of sound

A body of mass 5 kg has a velocity of 20 metres per second. Its momentum is .

Explain how Corpuscular theory predicts the speed of light in amedium, say, water, to be greater than the speed of light in vacuum.Is the prediction confirmed by experimental determination of thespeed of light in water? If not, which alternative picture of light isconsistent with experiment?

Q.11> Is steady current the onlysource of magnetic field. Explain with reference to Ampere's law

The density of a material in C.G.S system is 4g/cm^3.In a system in which unit of l=10 cm,M =1000g .the value of density of material will be?

10. A uniform sphere is placed on a smooth horizontalsurface and a horizontal force Fis applied on it at adistance h above the surface. The acceleration of thecentre(a) is maximum when h =0(b) is maximum when h R(c) is maximum when h=2R(d) is independent of h.

a rectangular tank 10m long,5 m broad and 3m high.It is filled to the rim with water of density 10^kg/m^3. calculate thrust at the bottom and walls of tank due to hydrostatic pressure

If a man weighs 70 kg what will his weight be on moon?

Why field lines are perpendicular to the surface of the conductor?

Initially a car is moving with speed of 20 ms^-1 and covers a distance of 100 m before it comes to rest. On making the initial speed of car is 40 ms^-1 keeping the acceleration same, the distance travelled by car before it comes to rest is

A bullet of mass 100 g has attained a velocity of 1080 km h−1 towards the target. What would its kinetic energy be at that moment?

Two batteries, one of emf 18 volts and internal resistance 2 Ω and the other of emf 12 volts and internal resistance 1 Ω, are connected as shown. The reading of the voltmeter V will be:

Vijay is pulling a block with 22 N force and Gopal is pulling it with 10 N force in opposite direction. Vijay is able to pull the block upto total distance 6.5 m. Find the net work done.

A cricket ball is droped from a height of 20 metres. calculate the speed of the ball when it hits the ground. IN THIS QUESTION CAN WE TAKE FINAL VELOCITY,DISPLCEMENT S AND ACCELERATION DUE TO GRAVITY AS NEGATIVE?

How much heat must be absorbed by 525 grams of water to raise its temperature by 45° C?

The value of the universal gravitational constant is .

What is the speed of sound

Figure below shows the distance-time graph of three objects A, B and C. Find the speed of all the three bodies. Which of the following three is travelling the fastest? [3 MARKS]

A uniform cylinder of length L and mass M having cross - sectional area A is suspended, with its length vertical, from a fixed point by a massless spring such that it is half submerged in a liquid of density σ atequilibrium position. The extension x0 of the spring when it is in equilibrium is :

bride cart kite chance ride dance side fast sky part Do you know more words with these sounds?

at what height the accelaration due to gravity will be reduced to 36% of its value on the surface of the earth

Define:(a) Atom(b) Orbit(c) Atomic number(d) Atomic Mass number.

Which of the following mirror has the highest field of view?

The expression for acceleration due to gravity (g) near the surface of a planet of mass (M) and radius (r) is: G: Gravitational constant

Why it is difficult for a fireman to hold a hose, which ejects water at a high velocity ? Explain. [3 MARKS]

A refrigerator works between 4C and 30C. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is [Take 1 cal = 4.2 J)

A hydraulic lift has two pistons, the larger cross-sectional area is 40 times the smaller cross-sectional area. If an input force of 25 N is applied on the smaller cross-section, then the output force is

Newton's third law :

53.The loop moves towards a region of magnetic field. Draw the graph of I(+ 've direction) and time. Speed of the coil is constant and equal to v

A man of mass M stands at one end of a plank of length L which lies at rest on frictionless surface. The man walks on the other end of plank. If mass of plank is M/3 the distance man moves relative to the ground is L/4

If a acceleration of a body is 6x what is the velocity

What is the difference between electric field and electric field intensity?Are their formulae same or different?

What is the work done to lift an object weighing 100 g to a height of 50 m from an initial height of 20 m? (Assume g =10 m s−2)

The given function represents the temperature changes over years in a particular place.Find the range of the function.

Four students measured the reading by observing the position of pointer on the ammeter scale as shown below:Assuming that the ammeter has no zero error, the correct reading is :(1) 1.25 A(2) 1.30 A(3) 1.15 A(4) 1.1 A

If the length of a pendulum is made 9 times and mass of the bob is made 4 times then the value of time period becomes

A man in a hot air balloon, throws a stone downwards with a speed of 5 m/s with respect to the balloon. If the balloon is moving upwards with a constant acceleration of 5 m/s2, then the velocity of the stone relative to the man after 2 second is(Take g=10 m/s2)

What are fossil fuels? Give examples.

Do action and reaction act on the same body or different bodies? How are they related in magnitude and direction? Are they simultaneous or not?

A 2000 kg car moving at 40km/h is to be stopped by applying brakes in next 4.0m. What average force force (in kN) must be applied on it? A)20 B)25 C)31 D)50

For the graph given below choose the correct option. TableATableBa) Line Ai) Accelerated Motionb) Line Bii) Constant velocity(high magnitude)c) Curve Ciii) At restd) Line Eiv)Constant Velocity(low magnitude)

The distance of Venus from Sun is 1.082×1011m and its period of revolution is 244.633 days. If the period of revolution of the Earth around the Sun is 365.247 days, calculate its distance from the sun.

A concave mirror is half dipped in water. Focal length of portion of mirror in the air is f_1 and focal length of mirror in water is f_2, then (Take refractive index of water=4/3) (1) f_1>f_2 (2) f_1

A steel column pinned at both ends has a bucking load of 160 kN. If the column is effectively held in position and restrained against rotation at one end but neither held in position nor restrained against rotation at the other end, then its bucking load will be kN.40

Why do we feel a lot more heavier than before when we come out of a swimming pool

A metal ball of mass 200 g falls from a height of 5 m and hits a slab kept on the ground. If all the kinetic energy of the ball was imparted to the slab as heat energy, what is the rise in temperature of the slab? (Mass of slab : 5 kg, Specific heat capacity of slab = 2 J/kg∘C, g=10 m/s2)

A ball is thrown in air and falls down while moving in a curve path then the work down is ??? If no then explain 😇😇😇

Question 6What are the limitations of extracting energy from -(a) the wind? (b) Waves? (c) Tides?