13232 + Interview Questions in Physics Page 93 InterviewSolution

4601.	An object is placed at a distance u cm from a concave mirror of focal length f cm. The real image of the object is received on a screen placed at a distance of v cm from the mirror. The values of u are changed and the corresponding values of v are measured. What will be tye graph that will represent variation of 1/v with 1/u?
Answer» An object is placed at a distance u cm from a concave mirror of focal length f cm. The real image of the object is received on a screen placed at a distance of v cm from the mirror. The values of u are changed and the corresponding values of v are measured. What will be tye graph that will represent variation of 1/v with 1/u?

Discussion

4602.	Difference between average velocity and instantaneous velocity
Answer» Difference between average velocity and instantaneous velocity

Discussion

4603.	Abdul while driving to school computes the average speed for his trip to be 20 km per hour on his return trip along the same route there is less traffic and the average speed is 30 km per hour what is the average speed for Abdul trip
Answer» Abdul while driving to school computes the average speed for his trip to be 20 km per hour on his return trip along the same route there is less traffic and the average speed is 30 km per hour what is the average speed for Abdul trip

Discussion

4604.	Convert 1 mm of Hg into pascal. Take density of Hg = 13.6 ×103 kg m−3 and g= 9.8 m s−2.
Answer» Convert 1 mm of Hg into pascal. Take density of Hg = 13.6 $\times 10^{3}$ kg $m^{- 3}$ and g= 9.8 m $s^{- 2}$ .

Discussion

4605.	6.Show that moon would depart forever if it's speed is increased by 42%
Answer» 6.Show that moon would depart forever if it's speed is increased by 42%

Discussion

4606.	A cubical block is dipped completely in water. Each edge of the block is 1 cm in length. Find the buoyant force.
Answer» A cubical block is dipped completely in water. Each edge of the block is 1 cm in length. Find the buoyant force.

Discussion

4607.	32. Maximum magnification produced by simple micro-scope of focal length f = 5 cm is(1) 5(2) 7(4) 89 ()
Answer» 32. Maximum magnification produced by simple micro-scope of focal length f = 5 cm is(1) 5(2) 7(4) 89 ()

Discussion

4608.	If i equate the compression of spring using 1/2 kl^2 =Pl,I get 2P=KlBut if i directly equate force why am i getting P=Kl ?
Answer» If i equate the compression of spring using 1/2 kl^2 =Pl, I get 2P=Kl But if i directly equate force why am i getting P=Kl ?

Discussion

4609.	Question 5A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.
Answer» Question 5 A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

Discussion

4610.	178. Calculate the cell potential of the following cell:Pt(s)/ H2(g) (0.1 bar)/ BOH (0.1 Maq) \vert HA (0.1 M)/H2(g) (1 bar) \vert PtGiven: K (HA) = 10^{-7}, Kb (BOH) 10^-
Answer» 178. Calculate the cell potential of the following cell:Pt(s)/ H2(g) (0.1 bar)/ BOH (0.1 Maq) \vert HA (0.1 M)/H2(g) (1 bar) \vert PtGiven: K (HA) = 10^{-7}, Kb (BOH) 10^-

Discussion

4611.	Question 8Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion
Answer» Question 8 Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion

Discussion

4612.	The weight of an object in the coal mine, sea level, at the top of the mountain are W1,W2 and W3 respectively, then
Answer» The weight of an object in the coal mine, sea level, at the top of the mountain are $W_{1}, W_{2}$ and $W_{3}$ respectively, then

Discussion

4613.	What is kienetic energy?Explain briefly.
Answer» What is kienetic energy?Explain briefly.

Discussion

4614.	A 60 m long train moving on a straight level track passes a pole in 5 s. Find the speed of the train and the time it will take to cross a 540 m long bridge.
Answer» A 60 m long train moving on a straight level track passes a pole in 5 s. Find the speed of the train and the time it will take to cross a 540 m long bridge.

Discussion

4615.	dependence of intensity of gravitational field of earth with distance r from centre of earth is correctly represented by
Answer» dependence of intensity of gravitational field of earth with distance r from centre of earth is correctly represented by

Discussion

4616.	how much force is required to stop a bus of mass 5000 kg moving with a speed of 72km/h ?
Answer» how much force is required to stop a bus of mass 5000 kg moving with a speed of 72km/h ?

Discussion

4617.	If the acceleration due to gravity on Mars is more than that of Earth, then the weight of an object on Mars will be
Answer» If the acceleration due to gravity on Mars is more than that of Earth, then the weight of an object on Mars will be

Discussion

4618.	If a body is moving towards right, then net force on it also must be towards right. Do you work do you agree with this statement? Justify .
Answer» If a body is moving towards right, then net force on it also must be towards right. Do you work do you agree with this statement? Justify .

Discussion

4619.	66. Work function of a metal is4eV .Light of wavelength 1)295nm,2) 305nm,3)315nm, 4)325nm is made to fall on the same metal turn by turn ,which of the following wavelength will cause photoelectric emission Correct option is 1). Only 1)&2) 2). Only 3)&4) 3. all of these 4). None of these
Answer» 66. Work function of a metal is4eV .Light of wavelength 1)295nm,2) 305nm,3)315nm, 4)325nm is made to fall on the same metal turn by turn ,which of the following wavelength will cause photoelectric emission Correct option is 1). Only 1)&2) 2). Only 3)&4) 3. all of these 4). None of these

Discussion

4620.	The maximum mass of White Dwarf stars is 1.44 times the mass of the sun. What is this limit called?
Answer» The maximum mass of White Dwarf stars is 1.44 times the mass of the sun. What is this limit called?

Discussion

4621.	91. About one third of the body of a physicist swimming in the dead sea will be above the water line. Assuming that the human body density is 0.98g/cmcube. find the density of water in dead sea. Why is it so much greater than 1.0 g/cmcube?
Answer» 91. About one third of the body of a physicist swimming in the dead sea will be above the water line. Assuming that the human body density is 0.98g/cmcube. find the density of water in dead sea. Why is it so much greater than 1.0 g/cmcube?

Discussion

4622.	Starting from rest a car accelerates at a constant rate alpha and then retards at a constant rate bita to come to stop if the total time of motion is t. Find(i) Maximum velocity of car.(ii)Total distance travelled by the car.
Answer» Starting from rest a car accelerates at a constant rate alpha and then retards at a constant rate bita to come to stop if the total time of motion is t. Find (i) Maximum velocity of car. (ii)Total distance travelled by the car.

Discussion

4623.	Aplanet has a mass of eight times the mass of earth and density is also equal to eight times the average density of the earth.If g be the acceleration due to earth's gravity on its surface, then acceleration due to gravity on planet's surface will be
Answer» Aplanet has a mass of eight times the mass of earth and density is also equal to eight times the average density of the earth.If g be the acceleration due to earth's gravity on its surface, then acceleration due to gravity on planet's surface will be

Discussion

4624.	In vacuum all freely falling bodies have ____
Answer» In vacuum all freely falling bodies have ____

Discussion

4625.	The mass of water displaced by a solid of mass 400 g and volume 150 cm3 is
Answer» The mass of water displaced by a solid of mass 400 g and volume 150 cm³ is

Discussion

4626.	an object is projected vertically upward with speed\surd gR Rradius of earth,g acceleration due to gravity on surface of earth.find the max height attained by it
Answer» an object is projected vertically upward with speed\surd gR Rradius of earth,g acceleration due to gravity on surface of earth.find the max height attained by it

Discussion

4627.	An electrical appliance of 500 W is used for 5 hours per day. What will be the energy consumed by the appliance in 30 days?
Answer» An electrical appliance of 500 W is used for 5 hours per day. What will be the energy consumed by the appliance in 30 days?

Discussion

4628.	A particle is projected from ground at an angle 45 degree with initial velocity 20 root 2 ms-1 . The magnitude of average velocity in a time interval from t = 0 to t =3 sec is ?
Answer» A particle is projected from ground at an angle 45 degree with initial velocity 20 root 2 ms-1 . The magnitude of average velocity in a time interval from t = 0 to t =3 sec is ?

Discussion

4629.	The time periods of revolution of Earth and Jupiter are in the ratio 1:12. Then the radii of Jupiter and Earth are in the ratio .
Answer» The time periods of revolution of Earth and Jupiter are in the ratio 1:12. Then the radii of Jupiter and Earth are in the ratio .

Discussion

4630.	Merry go round uses the theory of___
Answer» Merry go round uses the theory of___

Discussion

4631.	Which of the following ray diagrams shows the image formation for an object placed at the centre of the curvature of a concave mirror?
Answer» Which of the following ray diagrams shows the image formation for an object placed at the centre of the curvature of a concave mirror?

Discussion

4632.	Q.A particle has initial velocity 7m/s towards east and acceleration 2m/s^2 towards west.Find distance and displacement it will cover in 4th second of its motion.
Answer» Q.A particle has initial velocity 7m/s towards east and acceleration 2m/s^2 towards west.Find distance and displacement it will cover in 4th second of its motion.

Discussion

4633.	The acceleration of particle is given by a=(2-v)m/s× s where v is a velocity of particle in m/s The velocity of particle at time t(at t=0,v=0)i
Answer» The acceleration of particle is given by a=(2-v)m/s× s where v is a velocity of particle in m/s The velocity of particle at time t(at t=0,v=0)i

Discussion

4634.	2. Obtain the relation between u,v,R if object lies in rarer medium and image formed is virtual
Answer» 2. Obtain the relation between u,v,R if object lies in rarer medium and image formed is virtual

Discussion

4635.	an object is placed 0.4m from a convex mirror and a plane mirror is placed at a dis†an ce of 0.3m from the object. the images formed in the two mirrors concides without parallex. what is the focal length of the convex mirror
Answer» an object is placed 0.4m from a convex mirror and a plane mirror is placed at a dis†an ce of 0.3m from the object. the images formed in the two mirrors concides without parallex. what is the focal length of the convex mirror

Discussion

4636.	A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is about
Answer» A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is about

4636.

A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is about

Answer»

A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is about

Discussion

4637.	Barometers can be used for which of the following purposes?
Answer» Barometers can be used for which of the following purposes?

Discussion

4638.	111.Find focal length of convex lens using distance object method and using needle and plane mirror
Answer» 111.Find focal length of convex lens using distance object method and using needle and plane mirror

Discussion

4639.	A block of mass 2.00 kg moving at a speed of 10.0 m/s accelerates at 3.00 m.s2for 5.00 s. Compute its final kinetic energy.
Answer» A block of mass 2.00 kg moving at a speed of 10.0 m/s accelerates at 3.00 $m . s^{2}$ for 5.00 s. Compute its final kinetic energy.

Discussion

4640.	Consider the following sound waves marked A, B, C and D : (a) Which two waves represent sounds of the same loudness but different pitch? (b) Which two waves represent sounds of the same frequency but different loudness? (c) State whether all these sound waves have been produced by the same vibrating body or different vibrating bodies? (d) Which vibrating body/ bodies could have generated the sound waves shown here?
Answer» Consider the following sound waves marked A, B, C and D : (a) Which two waves represent sounds of the same loudness but different pitch? (b) Which two waves represent sounds of the same frequency but different loudness? (c) State whether all these sound waves have been produced by the same vibrating body or different vibrating bodies? (d) Which vibrating body/ bodies could have generated the sound waves shown here?

4640.

Consider the following sound waves marked A, B, C and D : (a) Which two waves represent sounds of the same loudness but different pitch? (b) Which two waves represent sounds of the same frequency but different loudness? (c) State whether all these sound waves have been produced by the same vibrating body or different vibrating bodies? (d) Which vibrating body/ bodies could have generated the sound waves shown here?

Answer»

Consider the following sound waves marked A, B, C and D :

(a) Which two waves represent sounds of the same loudness but different pitch?

(b) Which two waves represent sounds of the same frequency but different loudness?

(c) State whether all these sound waves have been produced by the same vibrating body or different vibrating bodies?

(d) Which vibrating body/ bodies could have generated the sound waves shown here?

Discussion

4641.	What is the difference between and under note and an over tone?
Answer» What is the difference between and under note and an over tone?

Discussion

4642.	Define work. A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your solution. [3 MARKS]
Answer» Define work. A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your solution. [3 MARKS]

Discussion

4643.	Velocity of a train changes from 20m/s to 25m/s, when it accelerates at a rate 2m/s^2. Find the distance covered by the train.
Answer» Velocity of a train changes from 20m/s to 25m/s, when it accelerates at a rate 2m/s^2. Find the distance covered by the train.

Discussion

4644.	15 ice-cubes of 15 cubic cm each are made by freezing water. How much water (in ml) is used for making the ice ?
Answer» 15 ice-cubes of 15 cubic cm each are made by freezing water. How much water (in ml) is used for making the ice ?

Discussion

4645.	When a 23592 U isotope is bombarded with a neutron it generates 13351 Sb , four neutrons and
Answer» When a $_{92}^{235} U$ isotope is bombarded with a neutron it generates $_{51}^{133} Sb$ , four neutrons and

Discussion

4646.	Enlist 4 factors on which buoyant force due to a liquid on a body depends.
Answer» Enlist 4 factors on which buoyant force due to a liquid on a body depends.

Discussion

4647.

1. Listen to the sounds around you when you are on your way to school. Discuss with your friend the sounds that you heard. List them here – Sounds you heardSounds your friend heard _______ _ _ _ _ ___________________________________________________________________Disclaimer: Kindly refer to the textbook for the images.2. If there is no clock in the house to wake you in the morning, how will you wake up?Will you continue sleeping?3. What are the different ways of knowing the time during the day?

Answer»

1. Listen to the sounds around you when you are on your way to school. Discuss with your friend the sounds that you heard. List them here –

Sounds you heard	Sounds your friend heard
_______________ _______________ _______________ _______________ _______________	_______________ _______________ _______________ _______________ _______________

Disclaimer: Kindly refer to the textbook for the images.
2. If there is no clock in the house to wake you in the morning, how will you wake up?
Will you continue sleeping?
3. What are the different ways of knowing the time during the day?

Discussion

4648.	ntIf 500 sound waves are produced in 1 minute, what is time taken by a vibrating particle to move from its mean position to the immediate rarefaction?n
Answer» ntIf 500 sound waves are produced in 1 minute, what is time taken by a vibrating particle to move from its mean position to the immediate rarefaction?n

Discussion

4649.	a car travels with a uniform velocity of 20m/s for 5 seconds.the brakes are applied and the car is uniformly retarted.it comes to rest in further 8seconds.calculatethe distance travelled before the brakes are applied and the distance covered after the brakes are applied.find its average speed
Answer» a car travels with a uniform velocity of 20m/s for 5 seconds.the brakes are applied and the car is uniformly retarted.it comes to rest in further 8seconds.calculatethe distance travelled before the brakes are applied and the distance covered after the brakes are applied.find its average speed

Discussion

4650.	DO MIRRORS HAVE POWER
Answer» DO MIRRORS HAVE POWER

Discussion

Explore topic-wise InterviewSolutions in .

Difference between average velocity and instantaneous velocity

Abdul while driving to school computes the average speed for his trip to be 20 km per hour on his return trip along the same route there is less traffic and the average speed is 30 km per hour what is the average speed for Abdul trip

Convert 1 mm of Hg into pascal. Take density of Hg = 13.6 ×103 kg m−3 and g= 9.8 m s−2.

6.Show that moon would depart forever if it's speed is increased by 42%

A cubical block is dipped completely in water. Each edge of the block is 1 cm in length. Find the buoyant force.

32. Maximum magnification produced by simple micro-scope of focal length f = 5 cm is(1) 5(2) 7(4) 89 ()

If i equate the compression of spring using 1/2 kl^2 =Pl,I get 2P=KlBut if i directly equate force why am i getting P=Kl ?

Question 5A pendulum oscillates 40 times in 4 seconds. Find its time period and frequency.

178. Calculate the cell potential of the following cell:Pt(s)/ H2(g) (0.1 bar)/ BOH (0.1 Maq) \vert HA (0.1 M)/H2(g) (1 bar) \vert PtGiven: K (HA) = 10^{-7}, Kb (BOH) 10^-

Question 8Name the forces acting on a plastic bucket containing water held above ground level in your hand. Discuss why the forces acting on the bucket do not bring a change in its state of motion

The weight of an object in the coal mine, sea level, at the top of the mountain are W1,W2 and W3 respectively, then

What is kienetic energy?Explain briefly.

A 60 m long train moving on a straight level track passes a pole in 5 s. Find the speed of the train and the time it will take to cross a 540 m long bridge.

dependence of intensity of gravitational field of earth with distance r from centre of earth is correctly represented by

how much force is required to stop a bus of mass 5000 kg moving with a speed of 72km/h ?

If the acceleration due to gravity on Mars is more than that of Earth, then the weight of an object on Mars will be

If a body is moving towards right, then net force on it also must be towards right. Do you work do you agree with this statement? Justify .

66. Work function of a metal is4eV .Light of wavelength 1)295nm,2) 305nm,3)315nm, 4)325nm is made to fall on the same metal turn by turn ,which of the following wavelength will cause photoelectric emission Correct option is 1). Only 1)&2) 2). Only 3)&4) 3. all of these 4). None of these

The maximum mass of White Dwarf stars is 1.44 times the mass of the sun. What is this limit called?

91. About one third of the body of a physicist swimming in the dead sea will be above the water line. Assuming that the human body density is 0.98g/cmcube. find the density of water in dead sea. Why is it so much greater than 1.0 g/cmcube?

Starting from rest a car accelerates at a constant rate alpha and then retards at a constant rate bita to come to stop if the total time of motion is t. Find(i) Maximum velocity of car.(ii)Total distance travelled by the car.

Aplanet has a mass of eight times the mass of earth and density is also equal to eight times the average density of the earth.If g be the acceleration due to earth's gravity on its surface, then acceleration due to gravity on planet's surface will be

In vacuum all freely falling bodies have ____

The mass of water displaced by a solid of mass 400 g and volume 150 cm3 is

an object is projected vertically upward with speed\surd gR Rradius of earth,g acceleration due to gravity on surface of earth.find the max height attained by it

An electrical appliance of 500 W is used for 5 hours per day. What will be the energy consumed by the appliance in 30 days?

A particle is projected from ground at an angle 45 degree with initial velocity 20 root 2 ms-1 . The magnitude of average velocity in a time interval from t = 0 to t =3 sec is ?

The time periods of revolution of Earth and Jupiter are in the ratio 1:12. Then the radii of Jupiter and Earth are in the ratio .

Merry go round uses the theory of___

Which of the following ray diagrams shows the image formation for an object placed at the centre of the curvature of a concave mirror?

Q.A particle has initial velocity 7m/s towards east and acceleration 2m/s^2 towards west.Find distance and displacement it will cover in 4th second of its motion.

The acceleration of particle is given by a=(2-v)m/s× s where v is a velocity of particle in m/s The velocity of particle at time t(at t=0,v=0)i

2. Obtain the relation between u,v,R if object lies in rarer medium and image formed is virtual

an object is placed 0.4m from a convex mirror and a plane mirror is placed at a dis†an ce of 0.3m from the object. the images formed in the two mirrors concides without parallex. what is the focal length of the convex mirror

A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is about

Barometers can be used for which of the following purposes?

111.Find focal length of convex lens using distance object method and using needle and plane mirror

A block of mass 2.00 kg moving at a speed of 10.0 m/s accelerates at 3.00 m.s2for 5.00 s. Compute its final kinetic energy.

What is the difference between and under note and an over tone?

Define work. A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line joining A and B is horizontal, what is the work done on the object by the gravitational force? Explain your solution. [3 MARKS]

Velocity of a train changes from 20m/s to 25m/s, when it accelerates at a rate 2m/s^2. Find the distance covered by the train.

15 ice-cubes of 15 cubic cm each are made by freezing water. How much water (in ml) is used for making the ice ?

When a 23592 U isotope is bombarded with a neutron it generates 13351 Sb , four neutrons and

Enlist 4 factors on which buoyant force due to a liquid on a body depends.

ntIf 500 sound waves are produced in 1 minute, what is time taken by a vibrating particle to move from its mean position to the immediate rarefaction?n

a car travels with a uniform velocity of 20m/s for 5 seconds.the brakes are applied and the car is uniformly retarted.it comes to rest in further 8seconds.calculatethe distance travelled before the brakes are applied and the distance covered after the brakes are applied.find its average speed

DO MIRRORS HAVE POWER