13232 + Interview Questions in Physics Page 249 InterviewSolution

12401.	Which of the following statement(s) is/are correct about the weight of a body?
Answer» Which of the following statement(s) is/are correct about the weight of a body?

Discussion

12402.	A stone is projected from a point O on horizontal ground with speed u ms-1 at an angle θ above the horizontal, where sinθ = 3/5. The stone is at its highest point, when it has travelled a horizontal distance of 192 m.(a) Find the value of u. After passing through its highest point the stone strikes a vertical wall at a point 4 m above the ground. (b) Find the horizontal distance between O and the wall. At the instant, when the stone hits the wall, the horizontal component of the stone’s velocity is halved in magnitude and reversed in direction. The vertical component of the stone’s velocity does not change as a result of the stone hitting the wall. (c) Find the distance from the wall of the point, where the stone reaches the ground. [Ans. u = 20 m/s, 𝒙 = 32 m, 𝒙 ′= 3.2 m]
Answer» A stone is projected from a point O on horizontal ground with speed u ms-1 at an angle θ above the horizontal, where sinθ = 3/5. The stone is at its highest point, when it has travelled a horizontal distance of 192 m.(a) Find the value of u. After passing through its highest point the stone strikes a vertical wall at a point 4 m above the ground. (b) Find the horizontal distance between O and the wall. At the instant, when the stone hits the wall, the horizontal component of the stone’s velocity is halved in magnitude and reversed in direction. The vertical component of the stone’s velocity does not change as a result of the stone hitting the wall. (c) Find the distance from the wall of the point, where the stone reaches the ground. [Ans. u = 20 m/s, 𝒙 = 32 m, 𝒙 ′= 3.2 m]

Discussion

12403.	In the figure given below, PQ is the object; P /Q/ is its image, AA/ is the position of the mirror. Name the kind of mirror.
Answer» In the figure given below, PQ is the object; P ^/Q^/ is its image, AA^/ is the position of the mirror. Name the kind of mirror.

12403.

In the figure given below, PQ is the object; P /Q/ is its image, AA/ is the position of the mirror. Name the kind of mirror.

Answer»

In the figure given below, PQ is the object; P ^/Q^/ is its image, AA^/ is the position of the mirror. Name the kind of mirror.

Discussion

12404.	Match the following: Column A. Column B 1)Relative density of solid. (a)Mass of solid in air-Mass of solid. in water/Density of water 2)Volume of the solid. (b)Mass of solid/Volume of the solid 3)Density of a solid. (c)Wt.of solid in air/Wt.of solid in air -Wt of solid in water.
Answer» Match the following: Column A. Column B 1)Relative density of solid. (a)Mass of solid in air-Mass of solid. in water/Density of water 2)Volume of the solid. (b)Mass of solid/Volume of the solid 3)Density of a solid. (c)Wt.of solid in air/Wt.of solid in air -Wt of solid in water.

12404.

Match the following: Column A. Column B 1)Relative density of solid. (a)Mass of solid in air-Mass of solid. in water/Density of water 2)Volume of the solid. (b)Mass of solid/Volume of the solid 3)Density of a solid. (c)Wt.of solid in air/Wt.of solid in air -Wt of solid in water.

Answer»

Match the following:

Column A. Column B

1)Relative density of solid. (a)Mass of solid in air-Mass of solid. in water/Density of water

2)Volume of the solid. (b)Mass of solid/Volume of the solid

3)Density of a solid. (c)Wt.of solid in air/Wt.of solid in air -Wt of solid in water.

Discussion

12405.	If an electrical appliance of RΩ resistance draws a current ‘I’ for time ‘t’ and connected across a battery of potential V then the energy consumed by the appliance will be:
Answer» If an electrical appliance of $R Ω$ resistance draws a current ‘I’ for time ‘t’ and connected across a battery of potential V then the energy consumed by the appliance will be:

Discussion

12406.	A freely falling object travels 4.9 m in 1st second, 14.7 m in 2nd second, 24.5 m in 3rd second, and so on. This data shows that the motion of a freely falling object is a case of : (a) uniform motion (b) uniform acceleration (c) no acceleration (d) uniform velocity
Answer» A freely falling object travels 4.9 m in 1st second, 14.7 m in 2nd second, 24.5 m in 3rd second, and so on. This data shows that the motion of a freely falling object is a case of : (a) uniform motion (b) uniform acceleration (c) no acceleration (d) uniform velocity

12406.

A freely falling object travels 4.9 m in 1st second, 14.7 m in 2nd second, 24.5 m in 3rd second, and so on. This data shows that the motion of a freely falling object is a case of : (a) uniform motion (b) uniform acceleration (c) no acceleration (d) uniform velocity

Answer»

A freely falling object travels 4.9 m in 1st second, 14.7 m in 2nd second, 24.5 m in 3rd second, and so on. This data shows that the motion of a freely falling object is a case of :

(a) uniform motion (b) uniform acceleration

(c) no acceleration (d) uniform velocity

Discussion

12407.	What is the difference between uniform linear motion and uniform circular motion ? Explain with examples.
Answer» What is the difference between uniform linear motion and uniform circular motion ? Explain with examples.

Discussion

12408.	Among the following, the force that is not included in vander Waals forces is
Answer» Among the following, the force that is not included in vander Waals forces is

Discussion

12409.	Which of the following is an insulator of electricity?
Answer» Which of the following is an insulator of electricity?

Discussion

12410.	When a charged rod is brought near the disc of a negatively charged gold leaf electroscope, it is observed that the divergence of leaves decreases. What inference do you draw about the charge on the rod?
Answer» When a charged rod is brought near the disc of a negatively charged gold leaf electroscope, it is observed that the divergence of leaves decreases. What inference do you draw about the charge on the rod?

Discussion

12411.	If the radius of the earth were to shrink by 1% its mass remaining the same, the acceleration due to gravity on the earth's surface would
Answer» If the radius of the earth were to shrink by 1% its mass remaining the same, the acceleration due to gravity on the earth's surface would

Discussion

12412.	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 for a total distance of 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 for a total distance of 6.5 m. Find the net work done.

Discussion

12413.	Why does every object has a tendency to resist any change in its state (of rest or motion)
Answer» Why does every object has a tendency to resist any change in its state (of rest or motion)

Discussion

12414.	Name three greenhouse gases.
Answer» Name three greenhouse gases.

Discussion

12415.	What do you understand by the term unit ?
Answer» What do you understand by the term unit ?

Discussion

12416.	Two bodies of mass 10 kg and 12 kg are falling freely. What is the acceleration produced in the bodies due to force of gravity?
Answer» Two bodies of mass 10 kg and 12 kg are falling freely. What is the acceleration produced in the bodies due to force of gravity?

Discussion

12417.	Which of the following instruments are used for measuring mass?
Answer» Which of the following instruments are used for measuring mass?

Discussion

12418.	What are the fundamental units in S.I. system ? Name then along with their symbols.
Answer» What are the fundamental units in S.I. system ? Name then along with their symbols.

Discussion

12419.	What is an artificial magnet? State two reasons why do we need artificial magnets.
Answer» What is an artificial magnet? State two reasons why do we need artificial magnets.

Discussion

12420.	If the air on Earth's surface is replaced with water, then to what extent the water level must rise so as to maintain the same pressure [105N/m2] on Earth's surface? [Assume nothing above the water surface. given g = 10 m/s2, density of water = 1000 kg/m3.
Answer» If the air on Earth's surface is replaced with water, then to what extent the water level must rise so as to maintain the same pressure $[10^{5} N / m^{2}]$ on Earth's surface? [Assume nothing above the water surface. given g = 10 $m / s^{2}$ , density of water = 1000 $k g / m^{3}$ .

Discussion

12421.	Calculate the volume of a book which is 25cm in length, 12cm in breadth and 2cm in height in m3.
Answer» Calculate the volume of a book which is 25cm in length, 12cm in breadth and 2cm in height in $m^{3}$ .

Discussion

12422.	A body moves in a circle of radius 2r what is the distance covered and displacement of body after 2 complete rounds
Answer» A body moves in a circle of radius 2r what is the distance covered and displacement of body after 2 complete rounds

Discussion

12423.	DeScribe and activity to illustrate the property of inertia of rest
Answer» DeScribe and activity to illustrate the property of inertia of rest

Discussion

12424.	The value of g on moon is 1/6 the value of on Earth. A man can jump 1.5 high on the Earth . He can jump on moon up to height of : ?.answer the question mark.
Answer» The value of g on moon is 1/6 the value of on Earth. A man can jump 1.5 high on the Earth . He can jump on moon up to height of : ?.answer the question mark.

Discussion

12425.	Why acceleration is greater at poles than the equator??
Answer» Why acceleration is greater at poles than the equator??

Discussion

12426.	A ball is thrown up vertically returns to the thrower after 8s. Its heights above the ground after 6s will be ( take g= 10m/s^2)
Answer» A ball is thrown up vertically returns to the thrower after 8s. Its heights above the ground after 6s will be ( take g= 10m/s^2)

Discussion

12427.	Brakes applied to a car produces an acceleration of 6 m/^2.if the car takes 2 sec to stop after the application of brakes . Calculate the distance travelled by the car during this time?
Answer» Brakes applied to a car produces an acceleration of 6 m/^2.if the car takes 2 sec to stop after the application of brakes . Calculate the distance travelled by the car during this time?

Discussion

12428.	A wooden block floats in glycerine in such a way that it's 2/5 volume remains above surface. If relative density of wood is 0•78. Calculate the relative density of glycerine.
Answer» A wooden block floats in glycerine in such a way that it's 2/5 volume remains above surface. If relative density of wood is 0•78. Calculate the relative density of glycerine.

Discussion

12429.	How is kinetic energy directly proportional to velocity^2
Answer» How is kinetic energy directly proportional to velocity^2

Discussion

12430.	A body of mass 60kg is moving with a speed of 50 m/s .find its kinetic energy.
Answer» A body of mass 60kg is moving with a speed of 50 m/s .find its kinetic energy.

Discussion

12431.	A bar magnet is cut in four pieces. Each piece will be a:-
Answer» A bar magnet is cut in four pieces. Each piece will be a:-

Discussion

12432.	A converging mirror is known as___ .
Answer» A converging mirror is known as___ .

Discussion

12433.	The power of a lens is -4 D. Find the focal length and type of the lens?
Answer» The power of a lens is -4 D. Find the focal length and type of the lens?

Discussion

12434.	Question 04 State the laws of reflection.
Answer» Question 04 State the laws of reflection.

Discussion

12435.	Use the following information to answer the next question. The needle inside a compass box always comes to rest in a particular direction. The direction indicated by a compass needle when it comes to rest is
Answer» Use the following information to answer the next question. The needle inside a compass box always comes to rest in a particular direction. The direction indicated by a compass needle when it comes to rest is

12435.

Use the following information to answer the next question. The needle inside a compass box always comes to rest in a particular direction. The direction indicated by a compass needle when it comes to rest is

Answer»

Use the following information to answer the next question.

The needle inside a compass box always comes to rest in a particular direction.

The direction indicated by a compass needle when it comes to rest is

Discussion

12436.	In a cyclic process, the internal energy of the gas
Answer» In a cyclic process, the internal energy of the gas

Discussion

12437.	A bell vibrates 600 times within 3/2 seconds, its frequency and time period will be:
Answer» A bell vibrates 600 times within 3/2 seconds, its frequency and time period will be:

Discussion

12438.	Is it possible to have a ray of light? [2 MARKS]
Answer» Is it possible to have a ray of light? [2 MARKS]

Discussion

12439.	Draw the velocity-time graph for a body moving with a uniform acceleration. Assume that the body is initially at rest.
Answer» Draw the velocity-time graph for a body moving with a uniform acceleration. Assume that the body is initially at rest.

Discussion

12440.	With the increase in temperature, the resistance of a pure metal ____.
Answer» With the increase in temperature, the resistance of a pure metal ____.

Discussion

12441.	Question 2 A car is accelerated on a leveled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car (a) does not change (b) becomes twice to that of initial (c) becomes 4 times that of initial (d) becomes 16 times that of initial
Answer» Question 2 A car is accelerated on a leveled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car (a) does not change (b) becomes twice to that of initial (c) becomes 4 times that of initial (d) becomes 16 times that of initial

Discussion

12442.	A deep sea diver jumps into a sea in search of a ship wreck located below the sea level. The suit of the diver helps him maintain his body pressure at the normal atmospheric pressure. This suit can sustain a maximum pressure of 6 atm. The density of sea water is 1.03 × 103 kg m−3 With reference to sea pressure, the diver can safely reach the maximum depth of about g = 9.8 m/s2 & 1atm = 1.01 × 105 Pa
Answer» A deep sea diver jumps into a sea in search of a ship wreck located below the sea level. The suit of the diver helps him maintain his body pressure at the normal atmospheric pressure. This suit can sustain a maximum pressure of 6 atm. The density of sea water is 1.03 × 10³ kg m⁻³ With reference to sea pressure, the diver can safely reach the maximum depth of about g = 9.8 m/s²& 1atm = 1.01 × 10⁵Pa

12442.

A deep sea diver jumps into a sea in search of a ship wreck located below the sea level. The suit of the diver helps him maintain his body pressure at the normal atmospheric pressure. This suit can sustain a maximum pressure of 6 atm. The density of sea water is 1.03 × 103 kg m−3 With reference to sea pressure, the diver can safely reach the maximum depth of about g = 9.8 m/s2 & 1atm = 1.01 × 105 Pa

Answer»

A deep sea diver jumps into a sea in search of a ship wreck located below the sea level. The suit of the diver helps him maintain his body pressure at the normal atmospheric pressure. This suit can sustain a maximum pressure of 6 atm. The density of sea water is 1.03 × 10³ kg m⁻³

With reference to sea pressure, the diver can safely reach the maximum depth of about

g = 9.8 m/s²& 1atm = 1.01 × 10⁵Pa

Discussion

12443.	Explain the phenomena of propagation of sound wave through compressions and rarefactions with the help of a suitable diagram. [5 MARKS]
Answer» Explain the phenomena of propagation of sound wave through compressions and rarefactions with the help of a suitable diagram. [5 MARKS]

Discussion

12444.	Name two factors on which the time period of a simple pendulum depends . Write the relation for the time period in terms of the above named factors.
Answer» Name two factors on which the time period of a simple pendulum depends . Write the relation for the time period in terms of the above named factors.

Discussion

12445.	A person walks from station A to station B. Then comes back to station A along the same path and walks upto C in the same direction. Where AB=AC=DM. Calculate total distance and displacement covered by the person ?
Answer» A person walks from station A to station B. Then comes back to station A along the same path and walks upto C in the same direction. Where AB=AC=DM. Calculate total distance and displacement covered by the person ?

Discussion

12446.	Why is the sky blue?
Answer» Why is the sky blue?

Discussion

12447.	When an object of height 3 cm is placed at a distance of 30 cm from a lens, a real image is formed at a distance of 60 cm. Find out the height of the object.
Answer» When an object of height 3 cm is placed at a distance of 30 cm from a lens, a real image is formed at a distance of 60 cm. Find out the height of the object.

Discussion

12448.	Why will protons stay together if like charges repel??
Answer» Why will protons stay together if like charges repel??

Discussion

12449.	A car travels a distance of 200 km from Delhi to Ambala towards North in 5 hours. Calculate (I)speed (ii)veloc vel of the car for this journey.
Answer» A car travels a distance of 200 km from Delhi to Ambala towards North in 5 hours. Calculate (I)speed (ii)veloc vel of the car for this journey.

Discussion

12450.	Arun was wondering how coals are categorised into energy quality grades. What is the parameter for classifying coals? Do you know?
Answer» Arun was wondering how coals are categorised into energy quality grades. What is the parameter for classifying coals? Do you know?

Discussion

Explore topic-wise InterviewSolutions in .

Which of the following statement(s) is/are correct about the weight of a body?

In the figure given below, PQ is the object; P /Q/ is its image, AA/ is the position of the mirror. Name the kind of mirror.

Match the following: Column A. Column B 1)Relative density of solid. (a)Mass of solid in air-Mass of solid. in water/Density of water 2)Volume of the solid. (b)Mass of solid/Volume of the solid 3)Density of a solid. (c)Wt.of solid in air/Wt.of solid in air -Wt of solid in water.

If an electrical appliance of RΩ resistance draws a current ‘I’ for time ‘t’ and connected across a battery of potential V then the energy consumed by the appliance will be:

A freely falling object travels 4.9 m in 1st second, 14.7 m in 2nd second, 24.5 m in 3rd second, and so on. This data shows that the motion of a freely falling object is a case of : (a) uniform motion (b) uniform acceleration (c) no acceleration (d) uniform velocity

What is the difference between uniform linear motion and uniform circular motion ? Explain with examples.

Among the following, the force that is not included in vander Waals forces is

Which of the following is an insulator of electricity?

When a charged rod is brought near the disc of a negatively charged gold leaf electroscope, it is observed that the divergence of leaves decreases. What inference do you draw about the charge on the rod?

If the radius of the earth were to shrink by 1% its mass remaining the same, the acceleration due to gravity on the earth's surface would

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 for a total distance of 6.5 m. Find the net work done.

Why does every object has a tendency to resist any change in its state (of rest or motion)

Name three greenhouse gases.

What do you understand by the term unit ?

Two bodies of mass 10 kg and 12 kg are falling freely. What is the acceleration produced in the bodies due to force of gravity?

Which of the following instruments are used for measuring mass?

What are the fundamental units in S.I. system ? Name then along with their symbols.

What is an artificial magnet? State two reasons why do we need artificial magnets.

If the air on Earth's surface is replaced with water, then to what extent the water level must rise so as to maintain the same pressure [105N/m2] on Earth's surface? [Assume nothing above the water surface. given g = 10 m/s2, density of water = 1000 kg/m3.

Calculate the volume of a book which is 25cm in length, 12cm in breadth and 2cm in height in m3.

A body moves in a circle of radius 2r what is the distance covered and displacement of body after 2 complete rounds

DeScribe and activity to illustrate the property of inertia of rest

The value of g on moon is 1/6 the value of on Earth. A man can jump 1.5 high on the Earth . He can jump on moon up to height of : ?.answer the question mark.

Why acceleration is greater at poles than the equator??

A ball is thrown up vertically returns to the thrower after 8s. Its heights above the ground after 6s will be ( take g= 10m/s^2)

Brakes applied to a car produces an acceleration of 6 m/^2.if the car takes 2 sec to stop after the application of brakes . Calculate the distance travelled by the car during this time?

A wooden block floats in glycerine in such a way that it's 2/5 volume remains above surface. If relative density of wood is 0•78. Calculate the relative density of glycerine.

How is kinetic energy directly proportional to velocity^2

A body of mass 60kg is moving with a speed of 50 m/s .find its kinetic energy.

A bar magnet is cut in four pieces. Each piece will be a:-

A converging mirror is known as___ .

The power of a lens is -4 D. Find the focal length and type of the lens?

Question 04 State the laws of reflection.

Use the following information to answer the next question. The needle inside a compass box always comes to rest in a particular direction. The direction indicated by a compass needle when it comes to rest is

In a cyclic process, the internal energy of the gas

A bell vibrates 600 times within 3/2 seconds, its frequency and time period will be:

Is it possible to have a ray of light? [2 MARKS]

Draw the velocity-time graph for a body moving with a uniform acceleration. Assume that the body is initially at rest.

With the increase in temperature, the resistance of a pure metal ____.

Question 2 A car is accelerated on a leveled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car (a) does not change (b) becomes twice to that of initial (c) becomes 4 times that of initial (d) becomes 16 times that of initial

Explain the phenomena of propagation of sound wave through compressions and rarefactions with the help of a suitable diagram. [5 MARKS]

Name two factors on which the time period of a simple pendulum depends . Write the relation for the time period in terms of the above named factors.

A person walks from station A to station B. Then comes back to station A along the same path and walks upto C in the same direction. Where AB=AC=DM. Calculate total distance and displacement covered by the person ?

Why is the sky blue?

When an object of height 3 cm is placed at a distance of 30 cm from a lens, a real image is formed at a distance of 60 cm. Find out the height of the object.

Why will protons stay together if like charges repel??

A car travels a distance of 200 km from Delhi to Ambala towards North in 5 hours. Calculate (I)speed (ii)veloc vel of the car for this journey.

Arun was wondering how coals are categorised into energy quality grades. What is the parameter for classifying coals? Do you know?