13232 + Interview Questions in Physics Page 245 InterviewSolution

12201.	Does moon also revolves in elliptical orbit
Answer» Does moon also revolves in elliptical orbit

Discussion

12202.	Which has more inertia : a twenty five paisa coin or a one rupee coin ?
Answer» Which has more inertia : a twenty five paisa coin or a one rupee coin ?

Discussion

12203.	In the following diagram PA, PB, PC, PD and PE be the pressure exerted by the liquid in the vessels A, B, C, D and E respectively. Find the correct order of pressure exerted by each vessel.
Answer» In the following diagram $P_{A}, P_{B}, P_{C}, P_{D} a n d P_{E}$ be the pressure exerted by the liquid in the vessels A, B, C, D and E respectively. Find the correct order of pressure exerted by each vessel.

12203.

In the following diagram PA, PB, PC, PD and PE be the pressure exerted by the liquid in the vessels A, B, C, D and E respectively. Find the correct order of pressure exerted by each vessel.

Answer»

In the following diagram $P_{A}, P_{B}, P_{C}, P_{D} a n d P_{E}$ be the pressure exerted by the liquid in the vessels A, B, C, D and E respectively. Find the correct order of pressure exerted by each vessel.

Discussion

12204.	When ice cubes are pressed over each other, they unite to form one cube. Which of the following force is responsible for holding them together?
Answer» When ice cubes are pressed over each other, they unite to form one cube. Which of the following force is responsible for holding them together?

Discussion

12205.	A force of 25 N25~ N25 N is applied at an angle of 60°60°60°in the direction of displacement. Calculate the amount of work done by the force if the displacement of the block is 5 m5~m5 m.
Answer» A force of $25 N$ is applied at an angle of $60°$ in the direction of displacement. Calculate the amount of work done by the force if the displacement of the block is $5 m$ .

Discussion

12206.	What is : periodic time, simple harmonic motion , wave, wave length, amplitude, frequency, wave velocity, audible sound, infrasonic sound, ultrasonic sound, echo and reverberation
Answer» What is : periodic time, simple harmonic motion , wave, wave length, amplitude, frequency, wave velocity, audible sound, infrasonic sound, ultrasonic sound, echo and reverberation

Discussion

12207.	derivation kinetic energy.
Answer» derivation kinetic energy.

Discussion

12208.	Identify the polar radius of the earth from the following.
Answer» Identify the polar radius of the earth from the following.

Discussion

12209.	State the principles on which liquid thermometer and digital thermometer work.
Answer» State the principles on which liquid thermometer and digital thermometer work.

Discussion

12210.	The amount of heat energy required to raise the temperature of 1g of water from 14.50C to 15.50C is
Answer» The amount of heat energy required to raise the temperature of $1 g$ of water from 14.5 $^{0} C$ to 15.5 $^{0} C$ is

Discussion

12211.	How will you show that there is vacuum above the surface of mercury in a barometer? What name is given to this vacuum?
Answer» How will you show that there is vacuum above the surface of mercury in a barometer? What name is given to this vacuum?

Discussion

12212.	A pendulum with a period of 1.8 s on Earth is moved to another planet. On the new planet, its period is 2.5 s. What can you conclude about this new planet?
Answer» A pendulum with a period of 1.8 s on Earth is moved to another planet. On the new planet, its period is 2.5 s. What can you conclude about this new planet?

Discussion

12213.	The least count of a stop watch is generally
Answer» The least count of a stop watch is generally

Discussion

12214.	State Newton's second law of motion.
Answer» State Newton's second law of motion.

Discussion

12215.	A heavy leather ball and a light tennis ball are kept on the floor of a moving train when train is suddenly stop they sit and motion in which direction will they move which one of them will attend higher velocity
Answer» A heavy leather ball and a light tennis ball are kept on the floor of a moving train when train is suddenly stop they sit and motion in which direction will they move which one of them will attend higher velocity

Discussion

12216.	Two children sit on a see-saw which is 6 m long and pivoted on an axis at its center. The first child has a mass of 20 kg and sits at the left end of the see-saw, while the second child has a mass of 40 kg and sits somewhere on the see-saw to the right of the axis. At what distance from the axis should the second child sit to keep the see-saw horizontal?
Answer» Two children sit on a see-saw which is 6 m long and pivoted on an axis at its center. The first child has a mass of 20 kg and sits at the left end of the see-saw, while the second child has a mass of 40 kg and sits somewhere on the see-saw to the right of the axis. At what distance from the axis should the second child sit to keep the see-saw horizontal?

12216.

Two children sit on a see-saw which is 6 m long and pivoted on an axis at its center. The first child has a mass of 20 kg and sits at the left end of the see-saw, while the second child has a mass of 40 kg and sits somewhere on the see-saw to the right of the axis. At what distance from the axis should the second child sit to keep the see-saw horizontal?

Answer»

Two children sit on a see-saw which is 6 m long and pivoted on an axis at its center. The first child has a mass of 20 kg and sits at the left end of the see-saw, while the second child has a mass of 40 kg and sits somewhere on the see-saw to the right of the axis. At what distance from the axis should the second child sit to keep the see-saw horizontal?

Discussion

12217.	Which of the following statements regarding the magnetic field produced by a bar magnet is incorrect?
Answer» Which of the following statements regarding the magnetic field produced by a bar magnet is incorrect?

Discussion

12218.	Which of the following are input units for a computer?
Answer» Which of the following are input units for a computer?

Discussion

12219.	We can hear the sound of the horn of an approaching car before the car reaches, because
Answer» We can hear the sound of the horn of an approaching car before the car reaches, because

Discussion

12220.	If sulphur content is high what is the grading for coal? Choose the most appropriate.
Answer» If sulphur content is high what is the grading for coal? Choose the most appropriate.

Discussion

12221.	On increasing the resistance in a circuit, the current in it ___.
Answer» On increasing the resistance in a circuit, the current in it ___.

Discussion

12222.	Is electricity unlimited for us?
Answer» Is electricity unlimited for us?

Discussion

12223.	What is the weight of body with a mass 3Kg
Answer» What is the weight of body with a mass 3Kg

Discussion

12224.	Which of the following actions are in free fall? 1. An object dropped from a certain height. 2. An object is thrown upward or a person jumping off. 3. Flying in an aircraft. 4. A car accelerating at 9.8 m/s2 on the road.
Answer» Which of the following actions are in free fall? 1. An object dropped from a certain height. 2. An object is thrown upward or a person jumping off. 3. Flying in an aircraft. 4. A car accelerating at 9.8 m/s² on the road.

12224.

Which of the following actions are in free fall? 1. An object dropped from a certain height. 2. An object is thrown upward or a person jumping off. 3. Flying in an aircraft. 4. A car accelerating at 9.8 m/s2 on the road.

Answer»

Which of the following actions are in free fall?

1. An object dropped from a certain height.
2. An object is thrown upward or a person jumping off.
3. Flying in an aircraft.
4. A car accelerating at 9.8 m/s² on the road.

Discussion

12225.	For velocity Vs time graph, if it shows a straight line horizontal to a time axis then___.
Answer» For velocity Vs time graph, if it shows a straight line horizontal to a time axis then___.

Discussion

12226.	What is recoil velocity?
Answer» What is recoil velocity?

Discussion

12227.	How much electrical energy in joules does a 100 watt lamp consume : (a) in 1 second ? (b) in 1 minute ?
Answer» How much electrical energy in joules does a 100 watt lamp consume : (a) in 1 second ? (b) in 1 minute ?

12227.

How much electrical energy in joules does a 100 watt lamp consume : (a) in 1 second ? (b) in 1 minute ?

Answer»

How much electrical energy in joules does a 100 watt lamp consume :

(a) in 1 second ?

(b) in 1 minute ?

Discussion

12228.	The heart of a man beats 75 times a minute. What is its (a) frequency and (b) time period ?
Answer» The heart of a man beats 75 times a minute. What is its (a) frequency and (b) time period ?

Discussion

12229.	The value of P=20 Pa and the value of A=0.5 m2. Find out the value of F.
Answer» The value of $P = 20 P a$ and the value of $A = 0.5 m^{2}$ . Find out the value of $F$ .

Discussion

12230.	What does the speed of sound wave depend upon
Answer» What does the speed of sound wave depend upon

Discussion

12231.	Consider iron and water. Sound travels faster in ___ (iron/water).
Answer» Consider iron and water. Sound travels faster in ___ (iron/water).

Discussion

12232.	State whether the motion of objects P and Q is uniform or non-uniform motion.
Answer» State whether the motion of objects P and Q is uniform or non-uniform motion.

12232.

State whether the motion of objects P and Q is uniform or non-uniform motion.

Answer»

State whether the motion of objects P and Q is uniform or non-uniform motion.

Discussion

12233.	A pressure of 1.5 pascal acts on a surface of area 13 square centimetres. The actual thrust acting on the surface is newton.
Answer» A pressure of 1.5 pascal acts on a surface of area 13 square centimetres. The actual thrust acting on the surface is newton.

Discussion

12234.	Two rods of same weight and equal length have different thickness. They are held vertically on the surface of sand as shown below. Which one of them will sink more? Why?
Answer» Two rods of same weight and equal length have different thickness. They are held vertically on the surface of sand as shown below. Which one of them will sink more? Why?

Discussion

12235.	Which of the following is not a valid velocity-time graph of a particle?
Answer» Which of the following is not a valid velocity-time graph of a particle?

Discussion

12236.	Why is the mass of an object increased when the velocity of the object is close to or equivalent to that of the speed of light ?? ( PLEASE EXPLAIN AT A 9th SATNADRD STUDENT LEVEL)
Answer» Why is the mass of an object increased when the velocity of the object is close to or equivalent to that of the speed of light ?? ( PLEASE EXPLAIN AT A 9th SATNADRD STUDENT LEVEL)

Discussion

12237.	An electric heater is rated 1500w. How much energy does it use in 10 hours
Answer» An electric heater is rated 1500w. How much energy does it use in 10 hours

Discussion

12238.	A thief is running on a train with 12km/h. The police car is moving with 80km/h. If speed of the train is 60km/h then what is the speed of the thief with reference to the police car?
Answer» A thief is running on a train with 12km/h. The police car is moving with 80km/h. If speed of the train is 60km/h then what is the speed of the thief with reference to the police car?

Discussion

12239.	Question 16 The weight of a person on a planet A is about half that on the earth. He can jump upto 0.4 m height on the surface of the earth. How high he can jump on the planet A?
Answer» Question 16 The weight of a person on a planet A is about half that on the earth. He can jump upto 0.4 m height on the surface of the earth. How high he can jump on the planet A?

Discussion

12240.	Two unequal Masses P and Q moving along a straight line are brought to rest by applying equal retarding forces . If P moves twice the time as Q but goes only (1/3)rd of the distance covered by Q before coming to rest , then find the ratio of their initial velocities .
Answer» Two unequal Masses P and Q moving along a straight line are brought to rest by applying equal retarding forces . If P moves twice the time as Q but goes only (1/3)^rdof the distance covered by Q before coming to rest , then find the ratio of their initial velocities .

Discussion

12241.	When a bullet is fired from a pistol, in which direction the pistol moves (ignore the force exerted by hand)?
Answer» When a bullet is fired from a pistol, in which direction the pistol moves (ignore the force exerted by hand)?

Discussion

12242.	Prove that, for a body thrown vertically upwards, the time of ascent is equal to the time of descent.
Answer» Prove that, for a body thrown vertically upwards, the time of ascent is equal to the time of descent.

Discussion

12243.	The magnitude of a physical quantity is expressed as Physical quantity = ___ × unit
Answer» The magnitude of a physical quantity is expressed as Physical quantity = ___ $\times$ unit

12243.

The magnitude of a physical quantity is expressed as Physical quantity = ___ × unit

Answer»

The magnitude of a physical quantity is expressed as

Physical quantity = ___ $\times$ unit

Discussion

12244.	Abdul while driving to school computes the average speed for his trip to be 20 km/h. On his return trip along the same route there is less traffic and average speed is 30 km/h. What is the average speed for Abdul's whole trip?
Answer» Abdul while driving to school computes the average speed for his trip to be 20 km/h. On his return trip along the same route there is less traffic and average speed is 30 km/h. What is the average speed for Abdul's whole trip?

Discussion

12245.	What is echo?
Answer» What is echo?

Discussion

12246.	On increasing resistance in a circuit, current in it :
Answer» On increasing resistance in a circuit, current in it :

Discussion

12247.	50 g of copper coin is heated to increase its temperature by 10 ∘C. The coin is then put in 10 g of water, after which it returns to its initial temperature before heating. What is the temperature change of water? (Specific heat of copper = 420 J kg−1 K−1, specific heat of water = 4186 J kg−1 K−1
Answer» $50 g$ of copper coin is heated to increase its temperature by $10^{\circ} C$ . The coin is then put in $10 g$ of water, after which it returns to its initial temperature before heating. What is the temperature change of water? (Specific heat of copper = $420 J k g^{- 1} K^{- 1}$ , specific heat of water = $4186 J k g^{- 1} K^{- 1}$

Discussion

12248.	A rectilinear motion is a motion in ___ dimension(s).
Answer» A rectilinear motion is a motion in ___ dimension(s).

Discussion

12249.	Propagation of sound can not be visualized as:
Answer» Propagation of sound can not be visualized as:

Discussion

12250.	The density of iron is 7.8 ×103 kg m−3. What is its relative density ?
Answer» The density of iron is 7.8 $\times 10^{3}$ kg $m^{- 3}$ . What is its relative density ?

Discussion

Explore topic-wise InterviewSolutions in .

Does moon also revolves in elliptical orbit

Which has more inertia : a twenty five paisa coin or a one rupee coin ?

In the following diagram PA, PB, PC, PD and PE be the pressure exerted by the liquid in the vessels A, B, C, D and E respectively. Find the correct order of pressure exerted by each vessel.

When ice cubes are pressed over each other, they unite to form one cube. Which of the following force is responsible for holding them together?

A force of 25 N25~ N25 N is applied at an angle of 60°60°60°in the direction of displacement. Calculate the amount of work done by the force if the displacement of the block is 5 m5~m5 m.

What is : periodic time, simple harmonic motion , wave, wave length, amplitude, frequency, wave velocity, audible sound, infrasonic sound, ultrasonic sound, echo and reverberation

derivation kinetic energy.

Identify the polar radius of the earth from the following.

State the principles on which liquid thermometer and digital thermometer work.

The amount of heat energy required to raise the temperature of 1g of water from 14.50C to 15.50C is

How will you show that there is vacuum above the surface of mercury in a barometer? What name is given to this vacuum?

A pendulum with a period of 1.8 s on Earth is moved to another planet. On the new planet, its period is 2.5 s. What can you conclude about this new planet?

The least count of a stop watch is generally

State Newton's second law of motion.

A heavy leather ball and a light tennis ball are kept on the floor of a moving train when train is suddenly stop they sit and motion in which direction will they move which one of them will attend higher velocity

Which of the following statements regarding the magnetic field produced by a bar magnet is incorrect?

Which of the following are input units for a computer?

We can hear the sound of the horn of an approaching car before the car reaches, because

If sulphur content is high what is the grading for coal? Choose the most appropriate.

On increasing the resistance in a circuit, the current in it ___.

Is electricity unlimited for us?

What is the weight of body with a mass 3Kg

Which of the following actions are in free fall? 1. An object dropped from a certain height. 2. An object is thrown upward or a person jumping off. 3. Flying in an aircraft. 4. A car accelerating at 9.8 m/s2 on the road.

For velocity Vs time graph, if it shows a straight line horizontal to a time axis then___.

What is recoil velocity?

How much electrical energy in joules does a 100 watt lamp consume : (a) in 1 second ? (b) in 1 minute ?

The heart of a man beats 75 times a minute. What is its (a) frequency and (b) time period ?

The value of P=20 Pa and the value of A=0.5 m2. Find out the value of F.

What does the speed of sound wave depend upon

Consider iron and water. Sound travels faster in ___ (iron/water).

State whether the motion of objects P and Q is uniform or non-uniform motion.

A pressure of 1.5 pascal acts on a surface of area 13 square centimetres. The actual thrust acting on the surface is newton.

Two rods of same weight and equal length have different thickness. They are held vertically on the surface of sand as shown below. Which one of them will sink more? Why?

Which of the following is not a valid velocity-time graph of a particle?

Why is the mass of an object increased when the velocity of the object is close to or equivalent to that of the speed of light ?? ( PLEASE EXPLAIN AT A 9th SATNADRD STUDENT LEVEL)

An electric heater is rated 1500w. How much energy does it use in 10 hours

A thief is running on a train with 12km/h. The police car is moving with 80km/h. If speed of the train is 60km/h then what is the speed of the thief with reference to the police car?

Question 16 The weight of a person on a planet A is about half that on the earth. He can jump upto 0.4 m height on the surface of the earth. How high he can jump on the planet A?

Two unequal Masses P and Q moving along a straight line are brought to rest by applying equal retarding forces . If P moves twice the time as Q but goes only (1/3)rd of the distance covered by Q before coming to rest , then find the ratio of their initial velocities .

When a bullet is fired from a pistol, in which direction the pistol moves (ignore the force exerted by hand)?

Prove that, for a body thrown vertically upwards, the time of ascent is equal to the time of descent.

The magnitude of a physical quantity is expressed as Physical quantity = ___ × unit

Abdul while driving to school computes the average speed for his trip to be 20 km/h. On his return trip along the same route there is less traffic and average speed is 30 km/h. What is the average speed for Abdul's whole trip?

What is echo?

On increasing resistance in a circuit, current in it :

A rectilinear motion is a motion in ___ dimension(s).

Propagation of sound can not be visualized as:

The density of iron is 7.8 ×103 kg m−3. What is its relative density ?