13232 + Interview Questions in Physics Page 60 InterviewSolution

2951.	MAN IS WALKING ON HORIZONTAL ROAD AT 6KM/HR TOWARDS SOUTH.RAIN IS FALLINGAT 6KM/HR MAKING 30 DEGREE WITH VERTICAL TOWARDS SOUTH.SPEEDWITH WHICH RAIN HITS MAN IS- A.3KM/HR B. 6KM/HR
Answer» MAN IS WALKING ON HORIZONTAL ROAD AT 6KM/HR TOWARDS SOUTH.RAIN IS FALLINGAT 6KM/HR MAKING 30 DEGREE WITH VERTICAL TOWARDS SOUTH.SPEEDWITH WHICH RAIN HITS MAN IS- A.3KM/HR B. 6KM/HR

Discussion

2952.	46.A body is projected with velocity v=a+bj. The velocity of body at highest point is?
Answer» 46.A body is projected with velocity v=a+bj. The velocity of body at highest point is?

Discussion

2953.	Explain how inertia is used to dust a floormat and to remove water drops from a wet cloth.
Answer» Explain how inertia is used to dust a floormat and to remove water drops from a wet cloth.

Discussion

2954.	A bag of mass M hangs by a long thread and abullet (mass m) comes horizontally with velocity v and get caught in the bag. Then for the combined system (bag + bullet)1) Momenturm is mMv/(M+ m) (2) Kinetic energy is 1/2Mv∧2 (3) Momentum is mv(M+m)/M (4) Kinetic e nergy is m∧2v∧2/2(M+m)
Answer» A bag of mass M hangs by a long thread and abullet (mass m) comes horizontally with velocity v and get caught in the bag. Then for the combined system (bag + bullet)1) Momenturm is mMv/(M+ m) (2) Kinetic energy is 1/2Mv∧2 (3) Momentum is mv(M+m)/M (4) Kinetic e nergy is m∧2v∧2/2(M+m)

Discussion

2955.	With what speed in mileshr must an object be thrown vertically upwards to reach a height of 91.5 m? Take a=9.8ms2
Answer» With what speed in $\frac{m i l e s}{h r}$ must an object be thrown vertically upwards to reach a height of 91.5 m? $T a k e a = 9.8 \frac{m}{s^{2}}$

Discussion

2956.	if a particle in motion has a non zero angular velocity w.r.to an observer then why it can move in any path including straight line motio
Answer» if a particle in motion has a non zero angular velocity w.r.to an observer then why it can move in any path including straight line motio

Discussion

2957.	A body is having a charge of 10 C. When it comes in contact with an uncharged body then it looses 1.6 C of charge. Find the number of electrons lost.
Answer» A body is having a charge of 10 C. When it comes in contact with an uncharged body then it looses 1.6 C of charge. Find the number of electrons lost.

Discussion

2958.	Ram and Shyam are climbing a tree. Ram weighs 50 kg and Shyam weighs 60 kg. Power spent by Ram and Shyam to climb the tree are in the ratio of 3:2. What is the ratio of time taken by Ram and Shyam to climb the tree?
Answer» Ram and Shyam are climbing a tree. Ram weighs $50 kg$ and Shyam weighs $60 kg$ . Power spent by Ram and Shyam to climb the tree are in the ratio of $3 : 2$ . What is the ratio of time taken by Ram and Shyam to climb the tree?

Discussion

2959.	What is the SI unit of mass?
Answer» What is the SI unit of mass?

Discussion

2960.	A particle of mass 2 kg travelling with some velocity and kinetic energy of 10 J collides elastically head on with another particle mass of 4 kg at rest.The fraction of total energy retained by the mass of 2 kg is?
Answer» A particle of mass 2 kg travelling with some velocity and kinetic energy of 10 J collides elastically head on with another particle mass of 4 kg at rest.The fraction of total energy retained by the mass of 2 kg is?

Discussion

2961.	A liquid with varying density is contained in a rectangular container of height 10 cm. The density of the liquid at depth h cm below the free surface is given by ρ=ρ0(1+h) , where ρ0=0.8gm cm−3. Its average density is 8k10gm cm−3 . The value of ′k′ is
Answer» A liquid with varying density is contained in a rectangular container of height $10$ $c m$ . The density of the liquid at depth h $c m$ below the free surface is given by $ρ = ρ_{0} (1 + h)$ , where $ρ_{0} = 0.8 g m c m^{- 3}$ . Its average density is $\frac{8 k}{10} g m c m^{- 3}$ . The value of $^{'} k^{'}$ is

Discussion

2962.	Take 5 examples from your surroundings and give explanation based on Newtons laws of motion.
Answer» Take 5 examples from your surroundings and give explanation based on Newtons laws of motion.

Discussion

2963.	To a person sitting in a train which is moving along a straight track, the platform appears to be __________.
Answer» To a person sitting in a train which is moving along a straight track, the platform appears to be __________.

Discussion

2964.	What are the symptoms of presbyopia?
Answer» What are the symptoms of presbyopia?

Discussion

2965.	A liquid of density 2p is filled in a cylindrical vessel with cross section 2A.A wooden cylinder of h height , A cross section and density p is floating in liquid at equilibrium with its axis verticle . Cylinder is pushed by small distance x from its equilibrium and released . Find its initial acceleration
Answer» A liquid of density 2p is filled in a cylindrical vessel with cross section 2A.A wooden cylinder of h height , A cross section and density p is floating in liquid at equilibrium with its axis verticle . Cylinder is pushed by small distance x from its equilibrium and released . Find its initial acceleration

Discussion

2966.	What is the duration between lubb and dubb sound?
Answer» What is the duration between lubb and dubb sound?

Discussion

2967.	A 0.80 m deep bed of sand filter (length 4m and width 3m) is made of uniform particles (diameter = 0.40 mm, specific gravity =2.65, shape factor =0.85) with bed porosity of 0.4. The bed has to be backwashed at a flow rate of 3.60 m3/min . During backwashing, if the terminal settling velocity of sand particles is 0.05 m/s, the expanded bed depth (in m, round off to 2 decimal places) is1.2075
Answer» A $0.80 m$ deep bed of sand filter (length $4 m$ and width $3 m$ ) is made of uniform particles (diameter = $0.40 m m$ , specific gravity $= 2.65$ , shape factor $= 0.85$ ) with bed porosity of $0.4$ . The bed has to be backwashed at a flow rate of $3.60 m^{3} / m i n$ . During backwashing, if the terminal settling velocity of sand particles is $0.05 m / s$ , the expanded bed depth (in m, round off to 2 decimal places) is 1.2075

Discussion

2968.	A positively charged rod is touched with the brass disc of a positively charged gold leaf electroscope. What is the effect on divergence of leaves?
Answer» A positively charged rod is touched with the brass disc of a positively charged gold leaf electroscope. What is the effect on divergence of leaves?

Discussion

2969.	The natural tendency of objects is to resist a change in their state of rest or uniform motion is called __
Answer» The natural tendency of objects is to resist a change in their state of rest or uniform motion is called __

Discussion

2970.	An easy explanation for momentum
Answer» An easy explanation for momentum

Discussion

2971.	12. Caluculate the volume of oxygen gas required at STP conditions for the complete combusion of 10cc of methane gas at 20^° C and 770 mm pressure
Answer» 12. Caluculate the volume of oxygen gas required at STP conditions for the complete combusion of 10cc of methane gas at 20^° C and 770 mm pressure

Discussion

2972.	Define the term acceleration due to gravity.State its average value.
Answer» Define the term acceleration due to gravity.State its average value.

Discussion

2973.	A body is dropped from top of a tower.During the last second of its fall,it covers 16/25 of the height of the tower calculate height of the tower
Answer» A body is dropped from top of a tower.During the last second of its fall,it covers 16/25 of the height of the tower calculate height of the tower

Discussion

2974.	PSLV-C32 ISRO's Polar Satellite Launch Vehicle recently launched the 1425 kg IRNSS-1F.In this context, which of the following statements is/are not correct? Codes :
Answer» PSLV-C32 ISRO's Polar Satellite Launch Vehicle recently launched the 1425 kg IRNSS-1F.In this context, which of the following statements is/are not correct? Codes :

2974.

PSLV-C32 ISRO's Polar Satellite Launch Vehicle recently launched the 1425 kg IRNSS-1F.In this context, which of the following statements is/are not correct? Codes :

Answer»

PSLV-C32 ISRO's Polar Satellite Launch Vehicle recently launched the 1425 kg IRNSS-1F.In this context, which of the following statements is/are not correct?

Codes :

Discussion

2975.	What happens to the velocity of the body if its inertia is increased by 2 times ?
Answer» What happens to the velocity of the body if its inertia is increased by 2 times ?

Discussion

2976.	The figure shows a beaker containing mercury. If a rectangular iron bar of mass 850 g is dropped in the mercury contained in this beaker, what will be the apparent weight of the iron bar?
Answer» The figure shows a beaker containing mercury. If a rectangular iron bar of mass 850 g is dropped in the mercury contained in this beaker, what will be the apparent weight of the iron bar?

2976.

The figure shows a beaker containing mercury. If a rectangular iron bar of mass 850 g is dropped in the mercury contained in this beaker, what will be the apparent weight of the iron bar?

Answer»

The figure shows a beaker containing mercury. If a rectangular iron bar of mass 850 g is dropped in the mercury contained in this beaker, what will be the apparent weight of the iron bar?

Discussion

2977.	A boy is sitting on a merry-go-round which is moving with a constant speed. This means that the boy is
Answer» A boy is sitting on a merry-go-round which is moving with a constant speed. This means that the boy is

Discussion

2978.	ntin a car race , car A takes 5s less than car B and passes the end point of the race with velocity v more than the velocity with which car B passes the point . if acceleration of car A and B are 9m/s2 and 4m/s2 then the time in which car B complete the racen
Answer» ntin a car race , car A takes 5s less than car B and passes the end point of the race with velocity v more than the velocity with which car B passes the point . if acceleration of car A and B are 9m/s2 and 4m/s2 then the time in which car B complete the racen

Discussion

2979.	54. A galvanometer of resistance G is connected in a circuit. Now a resistance R is connected in series with a galvanometer. To keep the main current in the circuit unchanged, the resistance to be connected with series combination of G and R is
Answer» 54. A galvanometer of resistance G is connected in a circuit. Now a resistance R is connected in series with a galvanometer. To keep the main current in the circuit unchanged, the resistance to be connected with series combination of G and R is

Discussion

2980.	A cyclist moves from a certain point x and goes round a circle of radius r and reaches y exactly the opposite side of the point x what is the distance and displacement of the cyclist during the journey?
Answer» A cyclist moves from a certain point x and goes round a circle of radius r and reaches y exactly the opposite side of the point x what is the distance and displacement of the cyclist during the journey?

Discussion

2981.	Define (1) Work (2) Energy (3) Power(4) Kinetic energy (5) Potential energy
Answer» Define (1) Work (2) Energy (3) Power (4) Kinetic energy (5) Potential energy

2981.

Define (1) Work (2) Energy (3) Power(4) Kinetic energy (5) Potential energy

Answer»

Define

(1) Work (2) Energy (3) Power

(4) Kinetic energy (5) Potential energy

Discussion

2982.	A car is running at 25 km/hr can be brought to rest by applying brakes in a distance of 0.5 m. if the same car is running at 75 km/hr how far will it go before coming to rest if braking force remains the same
Answer» A car is running at 25 km/hr can be brought to rest by applying brakes in a distance of 0.5 m. if the same car is running at 75 km/hr how far will it go before coming to rest if braking force remains the same

Discussion

2983.	A force vector applied on a mass is represented as F= 6 i -8 j +10 k and accelerates with 1 m/s ^2.What will be the mass of the body
Answer» A force vector applied on a mass is represented as F= 6 i -8 j +10 k and accelerates with 1 m/s ^2.What will be the mass of the body

Discussion

2984.	The transfer function V2(s)V1(s) of the circuit shown below is
Answer» The transfer function $\frac{V_{2} (s)}{V_{1} (s)}$ of the circuit shown below is

Discussion

2985.	Write an activity to prove that sound is a mechanical wave
Answer» Write an activity to prove that sound is a mechanical wave

Discussion

2986.	If 1/3 rd length of a chain of length l and mass m overhangs a smooth table with the other 2/rd resting on the table then what will be the kinetic energy of the chain as it completely slips of thre smooth table?
Answer» If 1/3 rd length of a chain of length l and mass m overhangs a smooth table with the other 2/rd resting on the table then what will be the kinetic energy of the chain as it completely slips of thre smooth table?

Discussion

2987.	How can reverberations in a big hall or auditorium be reduced ?
Answer» How can reverberations in a big hall or auditorium be reduced ?

Discussion

2988.	Two waves of wavelength 24 cm having intensities l0 and 9% interfere at a point where path difference between them is 8 cm. The intensity at the point is
Answer» Two waves of wavelength $24 c m$ having intensities $l_{0}$ and $9 %$ interfere at a point where path difference between them is $8 c m$ . The intensity at the point is

Discussion

2989.	The thrust F is exerted on area 2 A and thrust 3 F is exerted on area A2. Find the ratio of pressure exerted.
Answer» The thrust $F$ is exerted on area $2 A$ and thrust $3 F$ is exerted on area $\frac{A}{2}$ . Find the ratio of pressure exerted.

Discussion

2990.	A spinning wheel A is brought in contact with another wheel B initially at rest. Because of the friction at contact, the second wheel also starts spinning. Which of the following energies of the wheel B increase?
Answer» A spinning wheel A is brought in contact with another wheel B initially at rest. Because of the friction at contact, the second wheel also starts spinning. Which of the following energies of the wheel B increase?

Discussion

2991.	A body weighs 30 N and 15 N when .weighed under submerged conditions in liquids of relative densities 0.8 and 1.2 respectively. The volume of body in air will be litres.3.82
Answer» A body weighs $30 N$ and $15 N$ when .weighed under submerged conditions in liquids of relative densities $0.8$ and $1.2$ respectively. The volume of body in air will be litres. 3.82

Discussion

2992.	Question 35The calorific values of petrol and CNG are 45000 kJ/kg and 50,000 kJ/kg, respectively. If you have a vehicle which can run on petrol as well as CNG, which fuel will you prefer and why?
Answer» Question 35 The calorific values of petrol and CNG are 45000 kJ/kg and 50,000 kJ/kg, respectively. If you have a vehicle which can run on petrol as well as CNG, which fuel will you prefer and why?

Discussion

2993.	Two blocks A and B of mass m1 and mass m2 are kept in contact on frictionless table. A man pushes the block A from behind so that the blocks accelerate. If the block A exerts a force F on the block B, what is the force exerted by man on A?
Answer» Two blocks A and B of mass m1 and mass m2 are kept in contact on frictionless table. A man pushes the block A from behind so that the blocks accelerate. If the block A exerts a force F on the block B, what is the force exerted by man on A?

Discussion

2994.	the distance between sun and a planet is r.The angular momentum of planet around the sun in circular orbit is proportional to
Answer» the distance between sun and a planet is r.The angular momentum of planet around the sun in circular orbit is proportional to

Discussion

2995.	Two rods of length l1 and l2 are made of materials whose coefficient of linear expansion are α1 and α2. If difference between two lengths is independent of temperature then
Answer» Two rods of length $l_{1}$ and $l_{2}$ are made of materials whose coefficient of linear expansion are $α_{1}$ and $α_{2}$ . If difference between two lengths is independent of temperature then

Discussion

2996.	Match the following measuring instruments with their typical values of least counts.
Answer» Match the following measuring instruments with their typical values of least counts.

Discussion

2997.	A medium is required for the transfer of heat by the process of :
Answer» A medium is required for the transfer of heat by the process of :

Discussion

2998.	A current of 6.4 A is flowing in a conductor. The number of electrons passing per second through the conductor will be :
Answer» A current of 6.4 A is flowing in a conductor. The number of electrons passing per second through the conductor will be :

Discussion

2999.	A particle is moving along x-axis such that position is given by x=10(cosπ/2t+sinπ/2t) x(m) and t(sec) find the velocity between 0 to 1 s velocity at 1 second acceleration between 0 to 1 second acceleration at one second
Answer» A particle is moving along x-axis such that position is given by x=10(cosπ/2t+sinπ/2t) x(m) and t(sec) find the velocity between 0 to 1 s velocity at 1 second acceleration between 0 to 1 second acceleration at one second

Discussion

3000.	Which of the following are isotones with each other?
Answer» Which of the following are isotones with each other?

Discussion

Explore topic-wise InterviewSolutions in .

MAN IS WALKING ON HORIZONTAL ROAD AT 6KM/HR TOWARDS SOUTH.RAIN IS FALLINGAT 6KM/HR MAKING 30 DEGREE WITH VERTICAL TOWARDS SOUTH.SPEEDWITH WHICH RAIN HITS MAN IS- A.3KM/HR B. 6KM/HR

46.A body is projected with velocity v=a+bj. The velocity of body at highest point is?

Explain how inertia is used to dust a floormat and to remove water drops from a wet cloth.

A bag of mass M hangs by a long thread and abullet (mass m) comes horizontally with velocity v and get caught in the bag. Then for the combined system (bag + bullet)1) Momenturm is mMv/(M+ m) (2) Kinetic energy is 1/2Mv∧2 (3) Momentum is mv(M+m)/M (4) Kinetic e nergy is m∧2v∧2/2(M+m)

With what speed in mileshr must an object be thrown vertically upwards to reach a height of 91.5 m? Take a=9.8ms2

if a particle in motion has a non zero angular velocity w.r.to an observer then why it can move in any path including straight line motio

A body is having a charge of 10 C. When it comes in contact with an uncharged body then it looses 1.6 C of charge. Find the number of electrons lost.

Ram and Shyam are climbing a tree. Ram weighs 50 kg and Shyam weighs 60 kg. Power spent by Ram and Shyam to climb the tree are in the ratio of 3:2. What is the ratio of time taken by Ram and Shyam to climb the tree?

What is the SI unit of mass?

A particle of mass 2 kg travelling with some velocity and kinetic energy of 10 J collides elastically head on with another particle mass of 4 kg at rest.The fraction of total energy retained by the mass of 2 kg is?

A liquid with varying density is contained in a rectangular container of height 10 cm. The density of the liquid at depth h cm below the free surface is given by ρ=ρ0(1+h) , where ρ0=0.8gm cm−3. Its average density is 8k10gm cm−3 . The value of ′k′ is

Take 5 examples from your surroundings and give explanation based on Newtons laws of motion.

To a person sitting in a train which is moving along a straight track, the platform appears to be __________.

What are the symptoms of presbyopia?

What is the duration between lubb and dubb sound?

A positively charged rod is touched with the brass disc of a positively charged gold leaf electroscope. What is the effect on divergence of leaves?

The natural tendency of objects is to resist a change in their state of rest or uniform motion is called __

An easy explanation for momentum

12. Caluculate the volume of oxygen gas required at STP conditions for the complete combusion of 10cc of methane gas at 20^° C and 770 mm pressure

Define the term acceleration due to gravity.State its average value.

A body is dropped from top of a tower.During the last second of its fall,it covers 16/25 of the height of the tower calculate height of the tower

PSLV-C32 ISRO's Polar Satellite Launch Vehicle recently launched the 1425 kg IRNSS-1F.In this context, which of the following statements is/are not correct? Codes :

What happens to the velocity of the body if its inertia is increased by 2 times ?

The figure shows a beaker containing mercury. If a rectangular iron bar of mass 850 g is dropped in the mercury contained in this beaker, what will be the apparent weight of the iron bar?

A boy is sitting on a merry-go-round which is moving with a constant speed. This means that the boy is

ntin a car race , car A takes 5s less than car B and passes the end point of the race with velocity v more than the velocity with which car B passes the point . if acceleration of car A and B are 9m/s2 and 4m/s2 then the time in which car B complete the racen

54. A galvanometer of resistance G is connected in a circuit. Now a resistance R is connected in series with a galvanometer. To keep the main current in the circuit unchanged, the resistance to be connected with series combination of G and R is

A cyclist moves from a certain point x and goes round a circle of radius r and reaches y exactly the opposite side of the point x what is the distance and displacement of the cyclist during the journey?

Define (1) Work (2) Energy (3) Power(4) Kinetic energy (5) Potential energy

A car is running at 25 km/hr can be brought to rest by applying brakes in a distance of 0.5 m. if the same car is running at 75 km/hr how far will it go before coming to rest if braking force remains the same

A force vector applied on a mass is represented as F= 6 i -8 j +10 k and accelerates with 1 m/s ^2.What will be the mass of the body

The transfer function V2(s)V1(s) of the circuit shown below is

Write an activity to prove that sound is a mechanical wave

If 1/3 rd length of a chain of length l and mass m overhangs a smooth table with the other 2/rd resting on the table then what will be the kinetic energy of the chain as it completely slips of thre smooth table?

How can reverberations in a big hall or auditorium be reduced ?

Two waves of wavelength 24 cm having intensities l0 and 9% interfere at a point where path difference between them is 8 cm. The intensity at the point is

The thrust F is exerted on area 2 A and thrust 3 F is exerted on area A2. Find the ratio of pressure exerted.

A spinning wheel A is brought in contact with another wheel B initially at rest. Because of the friction at contact, the second wheel also starts spinning. Which of the following energies of the wheel B increase?

A body weighs 30 N and 15 N when .weighed under submerged conditions in liquids of relative densities 0.8 and 1.2 respectively. The volume of body in air will be litres.3.82

Question 35The calorific values of petrol and CNG are 45000 kJ/kg and 50,000 kJ/kg, respectively. If you have a vehicle which can run on petrol as well as CNG, which fuel will you prefer and why?

Two blocks A and B of mass m1 and mass m2 are kept in contact on frictionless table. A man pushes the block A from behind so that the blocks accelerate. If the block A exerts a force F on the block B, what is the force exerted by man on A?

the distance between sun and a planet is r.The angular momentum of planet around the sun in circular orbit is proportional to

Two rods of length l1 and l2 are made of materials whose coefficient of linear expansion are α1 and α2. If difference between two lengths is independent of temperature then

Match the following measuring instruments with their typical values of least counts.

A medium is required for the transfer of heat by the process of :

A current of 6.4 A is flowing in a conductor. The number of electrons passing per second through the conductor will be :

A particle is moving along x-axis such that position is given by x=10(cosπ/2t+sinπ/2t) x(m) and t(sec) find the velocity between 0 to 1 s velocity at 1 second acceleration between 0 to 1 second acceleration at one second

Which of the following are isotones with each other?