9478 + Interview Questions in Physics Page 106 InterviewSolution

5251.	Which of the following are the required conditions for rusting of iron?
Answer» Which of the following are the required conditions for rusting of iron?

Discussion

5252.	As we increase the temperature, the rate of diffusion _________
Answer» As we increase the temperature, the rate of diffusion _________

Discussion

5253.	What type of electric charge is acquired by a rubber balloon when rubbed with a woollen cloth?
Answer» What type of electric charge is acquired by a rubber balloon when rubbed with a woollen cloth?

Discussion

5254.	If the inversion temperature of a gas is -80 ^°C then it will produce cooling under joule Thomson effect at 298 K 273 K 193 K 173 k
Answer» If the inversion temperature of a gas is -80 ^°C then it will produce cooling under joule Thomson effect at 298 K 273 K 193 K 173 k

Discussion

5255.	Sensations felt by the nerve cells are transmitted to the brain through the ________.
Answer» Sensations felt by the nerve cells are transmitted to the brain through the ________.

Discussion

5256.	Question 1An electroscope is a device which is used to find if an object is(a) charged(b) magnetic(c) free of cracks(d) hot
Answer» Question 1 An electroscope is a device which is used to find if an object is (a) charged (b) magnetic (c) free of cracks (d) hot

5256.

Question 1An electroscope is a device which is used to find if an object is(a) charged(b) magnetic(c) free of cracks(d) hot

Answer»

Question 1

An electroscope is a device which is used to find if an object is

(a) charged

(b) magnetic

(c) free of cracks

(d) hot

Discussion

5257.	A skydiver who weighs 60 kg is moving at terminal speed. He covers 40 m in 2 seconds. The rate of doing work by the sky diver is ___ .
Answer» A skydiver who weighs 60 kg is moving at terminal speed. He covers 40 m in 2 seconds. The rate of doing work by the sky diver is ___ .

Discussion

5258.	41.What is the hybridisation of P in solid PBr5 ??
Answer» 41.What is the hybridisation of P in solid PBr5 ??

Discussion

5259.	If A=2i+3j+4k and B=4i+3j+2k , find AxB
Answer» If A=2i+3j+4k and B=4i+3j+2k , find AxB

Discussion

5260.	Explain why, porters place a thick, round piece of cloth on their heads when they have to carry heavy loads.
Answer» Explain why, porters place a thick, round piece of cloth on their heads when they have to carry heavy loads.

Discussion

5261.	a cubical block of mass 2.5 kg is kept on a levelled horizontal surface. if it exerts a pressure of 100pa on the surface then find the volume of the block .
Answer» a cubical block of mass 2.5 kg is kept on a levelled horizontal surface. if it exerts a pressure of 100pa on the surface then find the volume of the block .

Discussion

5262.	When the velocity of a relativistic charged particle increases. It's specific charge
Answer» When the velocity of a relativistic charged particle increases. It's specific charge

Discussion

5263.	The frictional force exerted by a fluid is called: (a) brag (b) drab (c) drag (d) tread
Answer» The frictional force exerted by a fluid is called: (a) brag (b) drab (c) drag (d) tread

Discussion

5264.	State one way in which the planet can be distinguished from the stars in the night sky ?
Answer» State one way in which the planet can be distinguished from the stars in the night sky ?

Discussion

5265.	Define pressure.
Answer» Define pressure.

Discussion

5266.	A boy walks over a rough surface, then the anglebetween the force of friction and the instantaneousvelocity of the boy is
Answer» A boy walks over a rough surface, then the anglebetween the force of friction and the instantaneousvelocity of the boy is

Discussion

5267.	136. Two charges particle having charge q and mass m are projected along two parallel lines separated by a distance
Answer» 136. Two charges particle having charge q and mass m are projected along two parallel lines separated by a distance

Discussion

5268.	Prodict the nature of work donecontaining water at 373 K is representing an open system, is placed in the room. predict the nature of work don
Answer» Prodict the nature of work donecontaining water at 373 K is representing an open system, is placed in the room. predict the nature of work don

Discussion

5269.	An electric motor exerts a constant torque5Nm on a fly wheel by which it is rotated atthe rate of 420rpm The power of motor is1)110watt220watt2)150watt4)300watt
Answer» An electric motor exerts a constant torque5Nm on a fly wheel by which it is rotated atthe rate of 420rpm The power of motor is1)110watt220watt2)150watt4)300watt

Discussion

5270.	A force can: 1. Increase the speed of a moving body. 2. Change the shape of an object. 3. Decrease the speed of a moving body. 4. Bring a moving body to rest.
Answer» A force can: 1. Increase the speed of a moving body. 2. Change the shape of an object. 3. Decrease the speed of a moving body. 4. Bring a moving body to rest.

Discussion

5271.	For an image formed by a plane mirror, the left part of the object appears on the right side in the image and vice versa. This is known as ___.
Answer» For an image formed by a plane mirror, the left part of the object appears on the right side in the image and vice versa. This is known as ___.

Discussion

5272.	What is vector and what is kirchoff law
Answer» What is vector and what is kirchoff law

Discussion

5273.	the ratio of specific charge of a proton and an α- particle is
Answer» the ratio of specific charge of a proton and an α- particle is

Discussion

5274.	A body is moving with const. angular velocity in a circle of radius r. If its speed is v, then angular velocity will be??
Answer» A body is moving with const. angular velocity in a circle of radius r. If its speed is v, then angular velocity will be??

Discussion

5275.	A man pulls a rope of negligible mass attached to a block.the man wears shoes that does not slip on the floor.the block moves towards the stationary man. Explain,How the block moves even if the net force on the moving block is zero,though a net non-zero force is initially required.??
Answer» A man pulls a rope of negligible mass attached to a block.the man wears shoes that does not slip on the floor.the block moves towards the stationary man. Explain,How the block moves even if the net force on the moving block is zero,though a net non-zero force is initially required.??

Discussion

5276.	ntwater falls from a height of 500m , what will be the rise in temperature of water?n
Answer» ntwater falls from a height of 500m , what will be the rise in temperature of water?n

Discussion

5277.	Which will cause more friction: a rough surface or a smooth surface? Why?
Answer» Which will cause more friction: a rough surface or a smooth surface? Why?

Discussion

5278.	how to identify if charge is point charge
Answer» how to identify if charge is point charge

Discussion

5279.	Charge present on 3g of (CO3)-2
Answer» Charge present on 3g of (CO3)-2

Discussion

5280.	The x - z plane separates two media A and B of refractive indices μA=2 and μB=3. A ray of light travels from A to B and its direction in the two media is given by the unit vectors. ^UA=a^i+b^j and ^UB=c^i+d^j respectively. Then, which of the following is true?
Answer» The $x$ - $z$ plane separates two media $A$ and $B$ of refractive indices $μ_{A} = 2$ and $μ_{B} = 3$ . A ray of light travels from $A$ to $B$ and its direction in the two media is given by the unit vectors. $_{A} = a^i + b^j$ and ${^U}_{B} = c^i + d^j$ respectively. Then, which of the following is true?

Discussion

5281.	Two identical rods - one hollow and the other solid, are heated to the same rise in temperature. Which will expand more?
Answer» Two identical rods - one hollow and the other solid, are heated to the same rise in temperature. Which will expand more?

Discussion

5282.	12.Calculate the equivalent resistance and the current I, in the given fig.
Answer» 12.Calculate the equivalent resistance and the current I, in the given fig.

Discussion

5283.	Which device can be used to test whether an object is carrying charge or not?
Answer» Which device can be used to test whether an object is carrying charge or not?

Discussion

5284.	A bridge is made from 20m long iron rods. At temperature 18∘C, the distance between two rods is 0.4cm. Up to what temperature will the bridge be in good shape? (Take coefficient of Linear expansion of iron is 11.5×10−6∘C)
Answer» A bridge is made from $20 m$ long iron rods. At temperature $18^{\circ} C$ , the distance between two rods is $0.4 c m$ . Up to what temperature will the bridge be in good shape? (Take coefficient of Linear expansion of iron is $11.5 \times 10^{- 6}^{\circ} C$ )

5284.

A bridge is made from 20m long iron rods. At temperature 18∘C, the distance between two rods is 0.4cm. Up to what temperature will the bridge be in good shape? (Take coefficient of Linear expansion of iron is 11.5×10−6∘C)

Answer»

A bridge is made from $20 m$ long iron rods. At temperature $18^{\circ} C$ , the distance between two rods is $0.4 c m$ . Up to what temperature will the bridge be in good shape?

(Take coefficient of Linear expansion of iron is $11.5 \times 10^{- 6}^{\circ} C$ )

Discussion

5285.	To melt a metal rod___.
Answer» To melt a metal rod___.

Discussion

5286.	Six equal resistance of 1 Ω each are connceted to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves at D.
Answer» Six equal resistance of $1 Ω$ each are connceted to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves at D.

Discussion

5287.	A rocket has been fired upward to launch a sattelite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad.
Answer» A rocket has been fired upward to launch a sattelite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad.

Discussion

5288.	37. Why d and f block have negligible shielding effect ?
Answer» 37. Why d and f block have negligible shielding effect ?

Discussion

5289.	The ratio of the coeffecient of friction drag in laminar boundary layer compared to that in turbulent boundary layer is proportional to
Answer» The ratio of the coeffecient of friction drag in laminar boundary layer compared to that in turbulent boundary layer is proportional to

Discussion

5290.	Earthquakes are most likely to occur in fault zones. Where are these fault zones normally situated?
Answer» Earthquakes are most likely to occur in fault zones. Where are these fault zones normally situated?

Discussion

5291.	Which of the following will not conduct electricity in aqueous solution?
Answer» Which of the following will not conduct electricity in aqueous solution?

Discussion

5292.	6. Calculate the current in a wire if 1500 C charge is passed through it in 5 minutes.
Answer» 6. Calculate the current in a wire if 1500 C charge is passed through it in 5 minutes.

Discussion

5293.	Two identical small charged spheres each having a mass m hang in equilibrium as shown in figure.The angle made by any string with vertical is θ. Find the magnitude of charge on sphere.
Answer» Two identical small charged spheres each having a mass $m$ hang in equilibrium as shown in figure. The angle made by any string with vertical is $θ$ . Find the magnitude of charge on sphere.

Discussion

5294.	What is the importance of air in transmission of sound?
Answer» What is the importance of air in transmission of sound?

Discussion

5295.	Pick the stringed instrument from the following:
Answer» Pick the stringed instrument from the following:

Discussion

5296.	what would happen to NO3^- ions in electroplating of silver
Answer» what would happen to NO3^- ions in electroplating of silver

Discussion

5297.	If the metal clip used in the electroscope is replaced by an ebonite rod and a charged body is brought in contact with it, will there be any effect on the aluminium strips? Explain.
Answer» If the metal clip used in the electroscope is replaced by an ebonite rod and a charged body is brought in contact with it, will there be any effect on the aluminium strips? Explain.

Discussion

5298.	Two balls with like charges are suspended freely as shown in the figure. Which of the following depicts the behaviour of the balls?
Answer» Two balls with like charges are suspended freely as shown in the figure. Which of the following depicts the behaviour of the balls?

Discussion

5299.	abody thrown verticslly upward with initial velocity 10 m per second.calcuate the maximum height reached if air firctionforces varies with velocity as mode f =mv square
Answer» abody thrown verticslly upward with initial velocity 10 m per second.calcuate the maximum height reached if air firctionforces varies with velocity as mode f =mv square

Discussion

5300.	Kinetic energy of a gas depends upon its
Answer» Kinetic energy of a gas depends upon its

5300.

Kinetic energy of a gas depends upon its

Answer»

Kinetic energy of a gas depends upon its

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following are the required conditions for rusting of iron?

As we increase the temperature, the rate of diffusion _________

What type of electric charge is acquired by a rubber balloon when rubbed with a woollen cloth?

If the inversion temperature of a gas is -80 ^°C then it will produce cooling under joule Thomson effect at 298 K 273 K 193 K 173 k

Sensations felt by the nerve cells are transmitted to the brain through the ________.

Question 1An electroscope is a device which is used to find if an object is(a) charged(b) magnetic(c) free of cracks(d) hot

A skydiver who weighs 60 kg is moving at terminal speed. He covers 40 m in 2 seconds. The rate of doing work by the sky diver is ___ .

41.What is the hybridisation of P in solid PBr5 ??

If A=2i+3j+4k and B=4i+3j+2k , find AxB

Explain why, porters place a thick, round piece of cloth on their heads when they have to carry heavy loads.

a cubical block of mass 2.5 kg is kept on a levelled horizontal surface. if it exerts a pressure of 100pa on the surface then find the volume of the block .

When the velocity of a relativistic charged particle increases. It's specific charge

The frictional force exerted by a fluid is called: (a) brag (b) drab (c) drag (d) tread

State one way in which the planet can be distinguished from the stars in the night sky ?

Define pressure.

A boy walks over a rough surface, then the anglebetween the force of friction and the instantaneousvelocity of the boy is

136. Two charges particle having charge q and mass m are projected along two parallel lines separated by a distance

Prodict the nature of work donecontaining water at 373 K is representing an open system, is placed in the room. predict the nature of work don

An electric motor exerts a constant torque5Nm on a fly wheel by which it is rotated atthe rate of 420rpm The power of motor is1)110watt220watt2)150watt4)300watt

A force can: 1. Increase the speed of a moving body. 2. Change the shape of an object. 3. Decrease the speed of a moving body. 4. Bring a moving body to rest.

For an image formed by a plane mirror, the left part of the object appears on the right side in the image and vice versa. This is known as ___.

What is vector and what is kirchoff law

the ratio of specific charge of a proton and an α- particle is

A body is moving with const. angular velocity in a circle of radius r. If its speed is v, then angular velocity will be??

A man pulls a rope of negligible mass attached to a block.the man wears shoes that does not slip on the floor.the block moves towards the stationary man. Explain,How the block moves even if the net force on the moving block is zero,though a net non-zero force is initially required.??

ntwater falls from a height of 500m , what will be the rise in temperature of water?n

Which will cause more friction: a rough surface or a smooth surface? Why?

how to identify if charge is point charge

Charge present on 3g of (CO3)-2

The x - z plane separates two media A and B of refractive indices μA=2 and μB=3. A ray of light travels from A to B and its direction in the two media is given by the unit vectors. ^UA=a^i+b^j and ^UB=c^i+d^j respectively. Then, which of the following is true?

Two identical rods - one hollow and the other solid, are heated to the same rise in temperature. Which will expand more?

12.Calculate the equivalent resistance and the current I, in the given fig.

Which device can be used to test whether an object is carrying charge or not?

A bridge is made from 20m long iron rods. At temperature 18∘C, the distance between two rods is 0.4cm. Up to what temperature will the bridge be in good shape? (Take coefficient of Linear expansion of iron is 11.5×10−6∘C)

To melt a metal rod___.

Six equal resistance of 1 Ω each are connceted to form the sides of a hexagon ABCDEF. Calculate the resistance offered by the combination if the current enters at A and leaves at D.

A rocket has been fired upward to launch a sattelite in its orbit. Name the two forces acting on the rocket immediately after leaving the launching pad.

37. Why d and f block have negligible shielding effect ?

The ratio of the coeffecient of friction drag in laminar boundary layer compared to that in turbulent boundary layer is proportional to

Earthquakes are most likely to occur in fault zones. Where are these fault zones normally situated?

Which of the following will not conduct electricity in aqueous solution?

6. Calculate the current in a wire if 1500 C charge is passed through it in 5 minutes.

Two identical small charged spheres each having a mass m hang in equilibrium as shown in figure.The angle made by any string with vertical is θ. Find the magnitude of charge on sphere.

What is the importance of air in transmission of sound?

Pick the stringed instrument from the following:

what would happen to NO3^- ions in electroplating of silver

If the metal clip used in the electroscope is replaced by an ebonite rod and a charged body is brought in contact with it, will there be any effect on the aluminium strips? Explain.

Two balls with like charges are suspended freely as shown in the figure. Which of the following depicts the behaviour of the balls?

abody thrown verticslly upward with initial velocity 10 m per second.calcuate the maximum height reached if air firctionforces varies with velocity as mode f =mv square

Kinetic energy of a gas depends upon its