13232 + Interview Questions in Physics Page 88 InterviewSolution

4351.	34 gm of H2O is decomposed to form _______ gm of hydrogen and ____ gm of oxygen.
Answer» 34 gm of $H_{2} O$ is decomposed to form _______ gm of hydrogen and ____ gm of oxygen.

Discussion

4352.	A force acts for 1 s on a body of mass 2.0 kg initially at rest. The force is then withdrawn and the body attains a velocity of 2 m/s. Find the magnitude of the force.
Answer» A force acts for 1 s on a body of mass 2.0 kg initially at rest. The force is then withdrawn and the body attains a velocity of 2 m/s. Find the magnitude of the force.

Discussion

4353.	What is the equivalent resistance between A and B?
Answer» What is the equivalent resistance between $A$ and $B$ ?

Discussion

4354.	When the temperature is increased the angle of contact of a liquid
Answer» When the temperature is increased the angle of contact of a liquid

4354.

When the temperature is increased the angle of contact of a liquid

Answer»

When the temperature is increased the angle of contact of a liquid

Discussion

4355.	The angular resolution of a radio telescope is to be 0.1∘, when the incident waves have a wavelength of 3.00 mm. The minimum diameter (in m) required for the telescope's receiving disc (in m) is 1.05n. The value of n is -
Answer» The angular resolution of a radio telescope is to be ${0.1}^{\circ}$ , when the incident waves have a wavelength of $3.00 mm .$ The minimum diameter $(in m)$ required for the telescope's receiving disc $(in m)$ is $1.05 n$ . The value of $n$ is -

Discussion

4356.	An aircraft traveling at 600km/h accelerates speedly at 10km/h/s taking the speed of sound as 1100km/h at the aircraft altitude.How long will it take to reach the sound barrier?
Answer» An aircraft traveling at 600km/h accelerates speedly at 10km/h/s taking the speed of sound as 1100km/h at the aircraft altitude.How long will it take to reach the sound barrier?

Discussion

4357.	Rahul chose an electrical device whose energy consumption is as shown in the left-most diagram while Rohan chose an electrical device whose energy consumption is as shown in the right-most diagram. Who among them do you think is wiser?
Answer» Rahul chose an electrical device whose energy consumption is as shown in the left-most diagram while Rohan chose an electrical device whose energy consumption is as shown in the right-most diagram. Who among them do you think is wiser?

Discussion

4358.	149.As shown in figure if a small horizontal displacement is given,then time period is
Answer» 149.As shown in figure if a small horizontal displacement is given,then time period is

Discussion

4359.	If the radius of earth shrinks by 1.5% (mass remaining same), then the value of gravitational acceleration changes by 1) 2% 2) -2% 3) 3% 4) -3%
Answer» If the radius of earth shrinks by 1.5% (mass remaining same), then the value of gravitational acceleration changes by 1) 2% 2) -2% 3) 3% 4) -3%

Discussion

4360.	A piece of wood is taken deep inside a long column of water and released, it will move up
Answer» A piece of wood is taken deep inside a long column of water and released, it will move up

Discussion

4361.	From a 200 m high tower, one ball is thrown upwards with a speed of 10 m/s and another is thrown vertically downwards at the same speeds simultaneously. The time difference between their reaching the ground will be nearest to
Answer» From a 200 m high tower, one ball is thrown upwards with a speed of 10 m/s and another is thrown vertically downwards at the same speeds simultaneously. The time difference between their reaching the ground will be nearest to

Discussion

4362.	What is gravitation?
Answer» What is gravitation?

Discussion

4363.	Why are long and wide openings provided at various locations in the fort?
Answer» Why are long and wide openings provided at various locations in the fort?

Discussion

4364.	A driving mirror consists of a cylindrical mirror of radius of curvature 10 cm and the length of the curved surface of the mirror is 10 cm. If the eye of the driver is assumed to be at a great distance from the mirror, then the field of view (in radians) is:[Assume paraxial approximation]
Answer» A driving mirror consists of a cylindrical mirror of radius of curvature $10 cm$ and the length of the curved surface of the mirror is $10 cm$ . If the eye of the driver is assumed to be at a great distance from the mirror, then the field of view (in $radians$ ) is: [Assume paraxial approximation]

Discussion

4365.	A block of mass 1 kg and density 0.8 g/cm3 is held stationary with the help of a string as shown in figure. The tank is filled with water such that the block is completely submerged in water. The tank is accelerating vertically upwards with an acceleration a=1.0 m/s2. Find the tension in the string.
Answer» A block of mass $1 kg$ and density $0.8 {g/cm}^{3}$ is held stationary with the help of a string as shown in figure. The tank is filled with water such that the block is completely submerged in water. The tank is accelerating vertically upwards with an acceleration $a = 1.0 {m/s}^{2}$ . Find the tension in the string.

Discussion

4366.	Which of the following statement is correct for a round trip along the same route?
Answer» Which of the following statement is correct for a round trip along the same route?

Discussion

4367.	Velocity-time graph for the uniform accelerated motions of two objects P and Q are shown in figure I and II respectively:(i) Which object starts from rest?(ii) Which object P and Q has more velocity after 5 second?
Answer» Velocity-time graph for the uniform accelerated motions of two objects P and Q are shown in figure I and II respectively: (i) Which object starts from rest? (ii) Which object P and Q has more velocity after 5 second?

4367.

Velocity-time graph for the uniform accelerated motions of two objects P and Q are shown in figure I and II respectively:(i) Which object starts from rest?(ii) Which object P and Q has more velocity after 5 second?

Answer»

Velocity-time graph for the uniform accelerated motions of two objects P and Q are shown in figure I and II respectively:

(i) Which object starts from rest?

(ii) Which object P and Q has more velocity after 5 second?

Discussion

4368.	The product of mass and velocity is called:
Answer» The product of mass and velocity is called:

Discussion

4369.	A unitless quantity:
Answer» A unitless quantity:

Discussion

4370.

Match the first column with appropriate entries in the second and third columns and remake the table. S. No. Column 1 Column 2 Column 3 1 Negative accelerationthe velocity of the object remains constant A car,initially at rest reaches a velocity of 50 km/hr in 10 seconds2 Positive acceleration the velocity of object decreases A vehicle is moving with a velocity of 25 m/s 3 Zero acceleration the velocity of object increases A vehicle moving with the velocity of 10 m/s, stops after 5 seconds.

Answer»

Match the first column with appropriate entries in the second and third columns and remake the table.

S. No.	Column 1	Column 2	Column 3
1	Negative acceleration	the velocity of the object remains constant	A car,initially at rest reaches a velocity of 50 km/hr in 10 seconds
2	Positive acceleration	the velocity of object decreases	A vehicle is moving with a velocity of 25 m/s
3	Zero acceleration	the velocity of object increases	A vehicle moving with the velocity of 10 m/s, stops after 5 seconds.

Discussion

4371.	A stone of mass 5 kg falls from the top of a 50 m high building and penetrates 1 m deep in the sand. Find the time taken to penetrate.
Answer» A stone of mass 5 kg falls from the top of a 50 m high building and penetrates 1 m deep in the sand. Find the time taken to penetrate.

Discussion

4372.	The weight of a body is 50 N. What is its mass ? (g=9.8m/s2).
Answer» The weight of a body is 50 N. What is its mass ? $(g = 9.8 m / s^{2})$ .

Discussion

4373.	Two objects of masses 100g and 200g are moving along the line and direction with velocities of 2m s-1 and 1m s-1 respectively ,They collide and after the collosion, the first object moves at a velocity of 1.67 m s-1. Determine the velocity of the secong object
Answer» Two objects of masses 100g and 200g are moving along the line and direction with velocities of 2m s^-1 and 1m s^-1 respectively ,They collide and after the collosion, the first object moves at a velocity of 1.67 m s^-1. Determine the velocity of the secong object

Discussion

4374.	The direction of velocity in a circular motion at any point is:
Answer» The direction of velocity in a circular motion at any point is:

Discussion

4375.	38. A bead is free to slide down a smooth wire tightly stretched btw A and B on a vertical circle of radius R. If the bead start from rest at A, the highest point on circle , its velocity at B is?
Answer» 38. A bead is free to slide down a smooth wire tightly stretched btw A and B on a vertical circle of radius R. If the bead start from rest at A, the highest point on circle , its velocity at B is?

Discussion

4376.	Calculate the pressure at a depth of 50 m below sea level.Given:Density of sea water = 1024 kg/m3.And, acceleration due to gravity g=10 m/s2
Answer» Calculate the pressure at a depth of $50 m$ below sea level. Given: Density of sea water = $1024 k g / m^{3}$ . And, acceleration due to gravity $g = 10 m / s^{2}$

4376.

Calculate the pressure at a depth of 50 m below sea level.Given:Density of sea water = 1024 kg/m3.And, acceleration due to gravity g=10 m/s2

Answer»

Calculate the pressure at a depth of $50 m$ below sea level.

Given:

Density of sea water = $1024 k g / m^{3}$ .

And, acceleration due to gravity $g = 10 m / s^{2}$

Discussion

4377.	Which of these statements are true? (A)The horse applies a force on the cart and the cart pulls the horse back with a force equal and opposite in direction. (B)The horse applies a force on the cart and the cart applies a force on the ground. (C)The two forces mentioned in option A cancel each other. (D)The two forces in option A are acting on two different bodies and don’t cancel each other.
Answer» Which of these statements are true? (A)The horse applies a force on the cart and the cart pulls the horse back with a force equal and opposite in direction. (B)The horse applies a force on the cart and the cart applies a force on the ground. (C)The two forces mentioned in option A cancel each other. (D)The two forces in option A are acting on two different bodies and don’t cancel each other.

Discussion

4378.	Two identical metal sphers having equal and similar charges repel each other with a force of 1800N when they are placed 10cms apart in a medium of dielectric constants. Determine the charge on each sphere.
Answer» Two identical metal sphers having equal and similar charges repel each other with a force of 1800N when they are placed 10cms apart in a medium of dielectric constants. Determine the charge on each sphere.

Discussion

4379.	Imagine a new planet having the same density as that of earth but it is 3 times bigger than the size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet will be?
Answer» Imagine a new planet having the same density as that of earth but it is 3 times bigger than the size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet will be?

Discussion

4380.	Two protons exert a nuclear force on each other, then what is the distance between them?
Answer» Two protons exert a nuclear force on each other, then what is the distance between them?

Discussion

4381.	Ocean thermal energy is due to what
Answer» Ocean thermal energy is due to what

Discussion

4382.	How do we connect these two identical cells of 1.5 volt each to design a 3.0 volt battery?
Answer» How do we connect these two identical cells of 1.5 volt each to design a 3.0 volt battery?

Discussion

4383.	State the principle of conservation of energy.
Answer» State the principle of conservation of energy.

Discussion

4384.	What is the distance travelled by a body and its displacement when it completes one revolution around a circular track with radius r?
Answer» What is the distance travelled by a body and its displacement when it completes one revolution around a circular track with radius r?

Discussion

4385.	Liquid rises in capillary upto the height of 10 cm the internal diameter of second capillary is equal to that of first capillary but external diameter of second capillary is double that of first capillary the height of liquid in it will be
Answer» Liquid rises in capillary upto the height of 10 cm the internal diameter of second capillary is equal to that of first capillary but external diameter of second capillary is double that of first capillary the height of liquid in it will be

Discussion

4386.	What is an external influence which changes or tends to change the state of rest or uniform motion of body called?
Answer» What is an external influence which changes or tends to change the state of rest or uniform motion of body called?

Discussion

4387.	The ab of length l and mass m can rotate freely about A in a vertical plane. a point mass m is attached to the other end of the rod and the system is released form its horizontal position . the initial angular acceleration is?
Answer» The ab of length l and mass m can rotate freely about A in a vertical plane. a point mass m is attached to the other end of the rod and the system is released form its horizontal position . the initial angular acceleration is ?

Discussion

4388.	Given initial velocity u and theta. Find instantaneous velocity v when projectile is moving perpendicular to the initial direction of motion?
Answer» Given initial velocity u and theta. Find instantaneous velocity v when projectile is moving perpendicular to the initial direction of motion?

Discussion

4389.	25. When a mosquito is alive it floats on water but when it dies it sinks whereas human when alive get drowned and when dead the lifeless body floats . Explain why❓❓
Answer» 25. When a mosquito is alive it floats on water but when it dies it sinks whereas human when alive get drowned and when dead the lifeless body floats . Explain why❓❓

Discussion

4390.	An object, weighing 40 N in air, loses 10 N weight when completely immersed in water. Will the object float or sink? Give reason.
Answer» An object, weighing 40 N in air, loses 10 N weight when completely immersed in water. Will the object float or sink? Give reason.

Discussion

4391.	Motion of a satellite in circular orbit is an example of
Answer» Motion of a satellite in circular orbit is an example of

Discussion

4392.	A bus appears to move northwards at a speed of 203km h-1, to a man driving his car eastwards with speed 20km h -1. Find the velocity of the bus w.r.t.ground.
Answer» A bus appears to move northwards at a speed of 203km h-1, to a man driving his car eastwards with speed 20km h -1. Find the velocity of the bus w.r.t.ground.

Discussion

4393.	A single acting two stage compressor with complete inter cooling delivers air at 16 bar. Assuming an intake state of 1 bar at 15oC, the presssure ratio per stage is
Answer» A single acting two stage compressor with complete inter cooling delivers air at $16$ bar. Assuming an intake state of $1$ bar at $15^{o} C$ , the presssure ratio per stage is

Discussion

4394.	147.Glass capillary tube of inner diameter .28 mm is lowered vertically into water in a vessel the pressure to be applied on the water in the capillary tube so that the water level in the tube is same as that in the vessel is( surface tension of water equals to 0.07 Newton per metre and atmospheric pressure equals to 10 to the power 5 Newton per metre square) 1)1000 2)100000 3)99000 4)101000
Answer» 147.Glass capillary tube of inner diameter .28 mm is lowered vertically into water in a vessel the pressure to be applied on the water in the capillary tube so that the water level in the tube is same as that in the vessel is( surface tension of water equals to 0.07 Newton per metre and atmospheric pressure equals to 10 to the power 5 Newton per metre square) 1)1000 2)100000 3)99000 4)101000

Discussion

4395.	Choose the correct increasing order of magnitude for different types of friction.
Answer» Choose the correct increasing order of magnitude for different types of friction.

Discussion

4396.	A ball of mass 50 gram moving with velocity ofo50 meter per second strike a wall and reflected by a velocity of 18 metre per second. If the type of contact between wall and wall is 1/20 second then find the change in momentum of the ball and also find the impulse imparted to the ball?
Answer» A ball of mass 50 gram moving with velocity ofo50 meter per second strike a wall and reflected by a velocity of 18 metre per second. If the type of contact between wall and wall is 1/20 second then find the change in momentum of the ball and also find the impulse imparted to the ball?

Discussion

4397.	There different objects of masses m, m2 and mare allowed to fall from rest and from the samepoint O' along three different frictionless paths. Thespeeds of the three objects on reaching the ground,will be in the ratio of?and why?
Answer» There different objects of masses m, m2 and mare allowed to fall from rest and from the samepoint O' along three different frictionless paths. Thespeeds of the three objects on reaching the ground,will be in the ratio of?and why?

Discussion

4398.	117.64 rain drops combine to form a single drop , find the ratio of total surface energy of 64 drops to that of a single drop?
Answer» 117.64 rain drops combine to form a single drop , find the ratio of total surface energy of 64 drops to that of a single drop?

Discussion

4399.	Two bodies A and B are having the same mass M. While the volume of body A is lesser than volume of body B. What is the relation between density of body A and body B.(Take density of body A=ρA and density of body B=ρb & volume of body A=VA and density of body B=VB )
Answer» Two bodies $A$ and $B$ are having the same mass $M$ . While the volume of body $A$ is lesser than volume of body $B$ . What is the relation between density of body $A$ and body $B$ . (Take density of body $A = ρ_{A}$ and density of body $B = ρ_{b}$ & volume of body $A = V_{A}$ and density of body $B = V_{B}$ )

Discussion

4400.	32. Uniform circular motion of a particle is periodic but not shm How??
Answer» 32. Uniform circular motion of a particle is periodic but not shm How??

Discussion

Explore topic-wise InterviewSolutions in .

34 gm of H2O is decomposed to form _______ gm of hydrogen and ____ gm of oxygen.

A force acts for 1 s on a body of mass 2.0 kg initially at rest. The force is then withdrawn and the body attains a velocity of 2 m/s. Find the magnitude of the force.

What is the equivalent resistance between A and B?

When the temperature is increased the angle of contact of a liquid

The angular resolution of a radio telescope is to be 0.1∘, when the incident waves have a wavelength of 3.00 mm. The minimum diameter (in m) required for the telescope's receiving disc (in m) is 1.05n. The value of n is -

An aircraft traveling at 600km/h accelerates speedly at 10km/h/s taking the speed of sound as 1100km/h at the aircraft altitude.How long will it take to reach the sound barrier?

Rahul chose an electrical device whose energy consumption is as shown in the left-most diagram while Rohan chose an electrical device whose energy consumption is as shown in the right-most diagram. Who among them do you think is wiser?

149.As shown in figure if a small horizontal displacement is given,then time period is

If the radius of earth shrinks by 1.5% (mass remaining same), then the value of gravitational acceleration changes by 1) 2% 2) -2% 3) 3% 4) -3%

A piece of wood is taken deep inside a long column of water and released, it will move up

From a 200 m high tower, one ball is thrown upwards with a speed of 10 m/s and another is thrown vertically downwards at the same speeds simultaneously. The time difference between their reaching the ground will be nearest to

What is gravitation?

Why are long and wide openings provided at various locations in the fort?

A driving mirror consists of a cylindrical mirror of radius of curvature 10 cm and the length of the curved surface of the mirror is 10 cm. If the eye of the driver is assumed to be at a great distance from the mirror, then the field of view (in radians) is:[Assume paraxial approximation]

Which of the following statement is correct for a round trip along the same route?

Velocity-time graph for the uniform accelerated motions of two objects P and Q are shown in figure I and II respectively:(i) Which object starts from rest?(ii) Which object P and Q has more velocity after 5 second?

The product of mass and velocity is called:

A unitless quantity:

A stone of mass 5 kg falls from the top of a 50 m high building and penetrates 1 m deep in the sand. Find the time taken to penetrate.

The weight of a body is 50 N. What is its mass ? (g=9.8m/s2).

Two objects of masses 100g and 200g are moving along the line and direction with velocities of 2m s-1 and 1m s-1 respectively ,They collide and after the collosion, the first object moves at a velocity of 1.67 m s-1. Determine the velocity of the secong object

The direction of velocity in a circular motion at any point is:

38. A bead is free to slide down a smooth wire tightly stretched btw A and B on a vertical circle of radius R. If the bead start from rest at A, the highest point on circle , its velocity at B is?

Calculate the pressure at a depth of 50 m below sea level.Given:Density of sea water = 1024 kg/m3.And, acceleration due to gravity g=10 m/s2

Two identical metal sphers having equal and similar charges repel each other with a force of 1800N when they are placed 10cms apart in a medium of dielectric constants. Determine the charge on each sphere.

Imagine a new planet having the same density as that of earth but it is 3 times bigger than the size. If the acceleration due to gravity on the surface of earth is g and that on the surface of the new planet will be?

Two protons exert a nuclear force on each other, then what is the distance between them?

Ocean thermal energy is due to what

How do we connect these two identical cells of 1.5 volt each to design a 3.0 volt battery?

State the principle of conservation of energy.

What is the distance travelled by a body and its displacement when it completes one revolution around a circular track with radius r?

Liquid rises in capillary upto the height of 10 cm the internal diameter of second capillary is equal to that of first capillary but external diameter of second capillary is double that of first capillary the height of liquid in it will be

What is an external influence which changes or tends to change the state of rest or uniform motion of body called?

The ab of length l and mass m can rotate freely about A in a vertical plane. a point mass m is attached to the other end of the rod and the system is released form its horizontal position . the initial angular acceleration is?

Given initial velocity u and theta. Find instantaneous velocity v when projectile is moving perpendicular to the initial direction of motion?

25. When a mosquito is alive it floats on water but when it dies it sinks whereas human when alive get drowned and when dead the lifeless body floats . Explain why❓❓

An object, weighing 40 N in air, loses 10 N weight when completely immersed in water. Will the object float or sink? Give reason.

Motion of a satellite in circular orbit is an example of

A bus appears to move northwards at a speed of 203km h-1, to a man driving his car eastwards with speed 20km h -1. Find the velocity of the bus w.r.t.ground.

A single acting two stage compressor with complete inter cooling delivers air at 16 bar. Assuming an intake state of 1 bar at 15oC, the presssure ratio per stage is

Choose the correct increasing order of magnitude for different types of friction.

A ball of mass 50 gram moving with velocity ofo50 meter per second strike a wall and reflected by a velocity of 18 metre per second. If the type of contact between wall and wall is 1/20 second then find the change in momentum of the ball and also find the impulse imparted to the ball?

There different objects of masses m, m2 and mare allowed to fall from rest and from the samepoint O' along three different frictionless paths. Thespeeds of the three objects on reaching the ground,will be in the ratio of?and why?

117.64 rain drops combine to form a single drop , find the ratio of total surface energy of 64 drops to that of a single drop?

Two bodies A and B are having the same mass M. While the volume of body A is lesser than volume of body B. What is the relation between density of body A and body B.(Take density of body A=ρA and density of body B=ρb & volume of body A=VA and density of body B=VB )

32. Uniform circular motion of a particle is periodic but not shm How??

34 gm of H2O is decomposed to form ___ gm of hydrogen and gm of oxygen.