13232 + Interview Questions in Physics Page 104 InterviewSolution

5151.	23. In a closed system :A(s) gives(reversible sign) 2B(g)+3C(g) if the partial pressure of C is doubled then partial pressure of B will be (1)Twice the original pressure (2)Half of its original pressure (3)1/2 root 2 (4)2 root 2 times its original pressure
Answer» 23. In a closed system :A(s) gives(reversible sign) 2B(g)+3C(g) if the partial pressure of C is doubled then partial pressure of B will be (1)Twice the original pressure (2)Half of its original pressure (3)1/2 root 2 (4)2 root 2 times its original pressure

Discussion

5152.	. From the top of a tower a ball is thrown up. Itreaches the ground in 6.4 s. A second ball throwndown with the same speed reach the ground in 3.6 s.A third ball released from rest will reach the ground
Answer» . From the top of a tower a ball is thrown up. Itreaches the ground in 6.4 s. A second ball throwndown with the same speed reach the ground in 3.6 s.A third ball released from rest will reach the ground

Discussion

5153.	If the atmospheric pressure is 105Nm2 and the density of water 103kgm3. What will be the depth below the surface of water if pressure is equal to thrice the atmospheric pressure?
Answer» If the atmospheric pressure is $10^{5} \frac{N}{m^{2}}$ and the density of water $10^{3} \frac{k g}{m^{3}}$ . What will be the depth below the surface of water if pressure is equal to thrice the atmospheric pressure?

5153.

If the atmospheric pressure is 105Nm2 and the density of water 103kgm3. What will be the depth below the surface of water if pressure is equal to thrice the atmospheric pressure?

Answer»

If the atmospheric pressure is $10^{5} \frac{N}{m^{2}}$ and the density of water $10^{3} \frac{k g}{m^{3}}$ . What will be the depth below the surface of water if pressure is equal to thrice the atmospheric pressure?

Discussion

5154.	It is difficult to balance a body when we accidentally step on a peel of Banana. why?
Answer» It is difficult to balance a body when we accidentally step on a peel of Banana. why?

Discussion

5155.	Sir/Mam,can an internal force change both K.E. and momentum of a body?(Neglect all the resisting forces.)
Answer» Sir/Mam,can an internal force change both K.E. and momentum of a body?(Neglect all the resisting forces.)

Discussion

5156.	When dough is kneaded, it changes its shape due to :
Answer» When dough is kneaded, it changes its shape due to :

Discussion

5157.	4. Work energy power A man pulls a bucket full of water from h metre deep well If the mass of the rope is m and the mass of the bucket with water is M Then work done by the man is
Answer» 4. Work energy power A man pulls a bucket full of water from h metre deep well If the mass of the rope is m and the mass of the bucket with water is M Then work done by the man is

Discussion

5158.	Why do magnetic lines start from north to south outside the magnet? Why not from south to north?
Answer» Why do magnetic lines start from north to south outside the magnet? Why not from south to north?

Discussion

5159.	if distance travelled by a particle is 10min 10s then find its speed
Answer» if distance travelled by a particle is 10min 10s then find its speed

Discussion

5160.	Why resonance does not operate in meta position
Answer» Why resonance does not operate in meta position

Discussion

5161.	if momentum is increase by 200% then % change in kinetic energy.
Answer» if momentum is increase by 200% then % change in kinetic energy.

Discussion

5162.	Two town a and b are connected by a regular bus service with the bus leaving either direction every t minute a man cycling with a speed of 20 km per hour in the direction from A to B notice that bus go past him every 18 in the direction of motion and every 6 minute in the opposite direction the speed with which assume constant Bus play on road
Answer» Two town a and b are connected by a regular bus service with the bus leaving either direction every t minute a man cycling with a speed of 20 km per hour in the direction from A to B notice that bus go past him every 18 in the direction of motion and every 6 minute in the opposite direction the speed with which assume constant Bus play on road

Discussion

5163.	A man weight mg in rocket accelerating upward with acceleration 4g. apparent weight of man is what
Answer» A man weight mg in rocket accelerating upward with acceleration 4g. apparent weight of man is what

Discussion

5164.	The CGS unit of force is ______
Answer» The CGS unit of force is ______

Discussion

5165.	In the circuit shown below, the ammeter and the voltmeter readings are 3 A and 6 V respectively. Then the value of the resistance R is
Answer» In the circuit shown below, the ammeter and the voltmeter readings are 3 A and 6 V respectively. Then the value of the resistance R is

5165.

In the circuit shown below, the ammeter and the voltmeter readings are 3 A and 6 V respectively. Then the value of the resistance R is

Answer»

In the circuit shown below, the ammeter and the voltmeter readings are 3 A and 6 V respectively. Then the value of the resistance R is

Discussion

5166.	What is the difference between grounding and earthing?
Answer» What is the difference between grounding and earthing?

Discussion

5167.	A radioactive element 23592X is bombarded with a neutron, it generates 8936Y, three neutrons and A56Z.The value of A is
Answer» A radioactive element $_{92}^{235} X$ is bombarded with a neutron, it generates $_{36}^{89} Y$ , three neutrons and $_{56}^{A} Z .$ The value of $A$ is

Discussion

5168.	A train starts from rest and accelerate uniformly at the rate of 2 m/s2 for 10 s. It then maintains a constant speed for 200 seconds. The brakes are then applied on the train is uniformly retarded and comes to rest in 50 seconds. Find: 1) The maximum velocity reached 2) The retardation in the last 50 seconds. 3) The total distance travelled. 4)The average velocity of the train
Answer» A train starts from rest and accelerate uniformly at the rate of 2 m/s2 for 10 s. It then maintains a constant speed for 200 seconds. The brakes are then applied on the train is uniformly retarded and comes to rest in 50 seconds. Find: 1) The maximum velocity reached 2) The retardation in the last 50 seconds. 3) The total distance travelled. 4)The average velocity of the train

Discussion

5169.	Name the form of energy which a wound up watch spring possesses.
Answer» Name the form of energy which a wound up watch spring possesses.

Discussion

5170.	If the displacement of a particle is zero, then what can you say about the distance covered by it?
Answer» If the displacement of a particle is zero, then what can you say about the distance covered by it?

Discussion

5171.	How is sunlight responsible for wind energy?
Answer» How is sunlight responsible for wind energy?

Discussion

5172.	Two particles A and B initially at rest, move towards each other by mutual force of attraction. At the instant when the speed of A is v and the speed of B is 2v, the speed of the centre of mass of the system is
Answer» Two particles A and B initially at rest, move towards each other by mutual force of attraction. At the instant when the speed of A is v and the speed of B is 2v, the speed of the centre of mass of the system is

Discussion

5173.	a stone is tied to on e end of string 50cm long and is whirled in a horizontal circle with cons†an t speed if the stone makes 10 revolution in20sec then what is the magnitude of acceleration of the stone
Answer» a stone is tied to on e end of string 50cm long and is whirled in a horizontal circle with cons†an t speed if the stone makes 10 revolution in20sec then what is the magnitude of acceleration of the stone

Discussion

5174.	Two waves of amplitude A and 2A interfere at a point, with a phase difference of π/3. What is the phase difference between the resul†an t amplitude and the wave of amplitude A
Answer» Two waves of amplitude A and 2A interfere at a point, with a phase difference of π/3. What is the phase difference between the resul†an t amplitude and the wave of amplitude A

Discussion

5175.	A ball is dropped from the top of a tower of unknown height. If the ball travels 35 m in the last second of its journey, find the height of the tower. (Take g=10 ms−2)
Answer» A ball is dropped from the top of a tower of unknown height. If the ball travels $35 m$ in the last second of its journey, find the height of the tower. $(T a k e g = 10 m s^{- 2})$

Discussion

5176.	Question 5If the moon attracts the earth, why does the earth not move towards the moon?
Answer» Question 5 If the moon attracts the earth, why does the earth not move towards the moon?

Discussion

5177.	a particle of mass 'm' moves on the axis of a ribg of radius R and mass M.if particle at rest released from P then its kinetic energy at centre c will b
Answer» a particle of mass 'm' moves on the axis of a ribg of radius R and mass M.if particle at rest released from P then its kinetic energy at centre c will b

Discussion

5178.	How can we determine the speed of an object from its distance time graph?
Answer» How can we determine the speed of an object from its distance time graph?

Discussion

5179.	A body of mass 10 kg is moving with a velocity 4 m/s. If P is the momentum associated with the body and K.E. is the kinetic energy. Then K.E. and P are:
Answer» A body of mass 10 kg is moving with a velocity 4 m/s. If P is the momentum associated with the body and K.E. is the kinetic energy. Then K.E. and P are:

Discussion

5180.	The wavelength of light is 589 nm. What is its wavelength in A∘ ?
Answer» The wavelength of light is 589 nm. What is its wavelength in A $^{\circ}$ ?

Discussion

5181.	(a) State the principle of flotation. (b) A floating boat displaces water weighing 6000 newtons. (i) What is the buoyant force on the boat ? (ii) What is the weight of the boat ?
Answer» (a) State the principle of flotation. (b) A floating boat displaces water weighing 6000 newtons. (i) What is the buoyant force on the boat ? (ii) What is the weight of the boat ?

5181.

(a) State the principle of flotation. (b) A floating boat displaces water weighing 6000 newtons. (i) What is the buoyant force on the boat ? (ii) What is the weight of the boat ?

Answer»

(a) State the principle of flotation.
(b) A floating boat displaces water weighing 6000 newtons.

(i) What is the buoyant force on the boat ?
(ii) What is the weight of the boat ?

Discussion

5182.	What is Jahn Teller Effect??
Answer» What is Jahn Teller Effect??

Discussion

5183.	What is the condition for a force to do work on a body ?
Answer» What is the condition for a force to do work on a body ?

Discussion

5184.	Which of the following is the infrared wavelength? (1) 10^{-4} cm (2) 10^{-5} cm (3) 10^{-6}cm (4) 10^- cm
Answer» Which of the following is the infrared wavelength? (1) 10^{-4} cm (2) 10^{-5} cm (3) 10^{-6}cm (4) 10^- cm

Discussion

5185.	refrigerator works between 4^°C and 30^°C. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is [Take 1 cal = 4.2 joules)
Answer» refrigerator works between 4^°C and 30^°C. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is [Take 1 cal = 4.2 joules)

Discussion

5186.	Why oxygen is not considered a green house gas
Answer» Why oxygen is not considered a green house gas

Discussion

5187.	Which of the following represents electrical power dissipated in an electrical circuit?
Answer» Which of the following represents electrical power dissipated in an electrical circuit?

Discussion

5188.	Is work a vector or scalar quantity .prove this
Answer» Is work a vector or scalar quantity .prove this

Discussion

5189.	Explain why the value of g is zero at the centre of the earth.
Answer» Explain why the value of g is zero at the centre of the earth.

Discussion

5190.	What will happen if you accidentally break a magnet? [2 MARKS]
Answer» What will happen if you accidentally break a magnet? [2 MARKS]

Discussion

5191.	an electric geyser consumes 3.2 units of electric energy per hour of its use calculate the power rating of this device and calculate its resis†an ce
Answer» an electric geyser consumes 3.2 units of electric energy per hour of its use calculate the power rating of this device and calculate its resis†an ce

Discussion

5192.	Define freefall
Answer» Define freefall

Discussion

5193.	A rod is placed along the line, y= 2x with its centre at origin. The moment of inertia of the rod is maximum about (a) X-axis(c) Z-axis(b) Y-axis(d) Data insufficient
Answer» A rod is placed along the line, y= 2x with its centre at origin. The moment of inertia of the rod is maximum about (a) X-axis(c) Z-axis(b) Y-axis(d) Data insufficient

Discussion

5194.	A boy sitting on the top most berth in the compartment of a train which is just going to stop on a railway station, drops an apple aiming at the open hand of his brother situated vertically below his hands at a { distance of about 2m . The apple will fall-
Answer» A boy sitting on the top most berth in the compartment of a train which is just going to stop on a railway station, drops an apple aiming at the open hand of his brother situated vertically below his hands at a { distance of about 2m . The apple will fall-

Discussion

5195.	A ball is thrown vertically upwards at speed of 20 m s−1. Find the time taken by the ball to reach back to the original position. [Take acceleration die to gravity, g=10 m s−2]
Answer» A ball is thrown vertically upwards at speed of $20 m s^{- 1}$ . Find the time taken by the ball to reach back to the original position. [Take acceleration die to gravity, $g = 10 m s^{- 2}$ ]

Discussion

5196.	A theif running on a train with 12km/h . The police car moving with 80 km/h . If the speed of the train is 60 km/h .what is the speed of theif w.r.t police car?
Answer» A theif running on a train with 12km/h . The police car moving with 80 km/h . If the speed of the train is 60 km/h .what is the speed of theif w.r.t police car?

Discussion

5197.	Two rods of equal length and mass are placed at an angle theta where will be centre of mass
Answer» Two rods of equal length and mass are placed at an angle theta where will be centre of mass

Discussion

5198.	A stone is dropped from the top of a building 200 m high and at the same time another stone is thrown vertically Upward from the ground with a velocity of 50 m/s. Find where and when the two stones will meet
Answer» A stone is dropped from the top of a building 200 m high and at the same time another stone is thrown vertically Upward from the ground with a velocity of 50 m/s. Find where and when the two stones will meet

Discussion

5199.	An object of mass 100 kg is accelerated uniformly from a velocity of 5 m/s to 8 m/s in 6 s. Calculate the initial and final momentum of the object
Answer» An object of mass 100 kg is accelerated uniformly from a velocity of 5 m/s to 8 m/s in 6 s. Calculate the initial and final momentum of the object

Discussion

5200.	टिकटों की तरह ही बच्चे और बड़े दूसरी चीज़ें भी जमा करते हैं। सिक्के उनमें से एक हैं। क्या तुम कुछ अन्य चीज़ों के बारे में सोच सकते हो जिन्हें जमा किया जा सकता है? उनके नाम लिखो।
Answer» टिकटों की तरह ही बच्चे और बड़े दूसरी चीज़ें भी जमा करते हैं। सिक्के उनमें से एक हैं। क्या तुम कुछ अन्य चीज़ों के बारे में सोच सकते हो जिन्हें जमा किया जा सकता है? उनके नाम लिखो।

Discussion

Explore topic-wise InterviewSolutions in .

23. In a closed system :A(s) gives(reversible sign) 2B(g)+3C(g) if the partial pressure of C is doubled then partial pressure of B will be (1)Twice the original pressure (2)Half of its original pressure (3)1/2 root 2 (4)2 root 2 times its original pressure

. From the top of a tower a ball is thrown up. Itreaches the ground in 6.4 s. A second ball throwndown with the same speed reach the ground in 3.6 s.A third ball released from rest will reach the ground

If the atmospheric pressure is 105Nm2 and the density of water 103kgm3. What will be the depth below the surface of water if pressure is equal to thrice the atmospheric pressure?

It is difficult to balance a body when we accidentally step on a peel of Banana. why?

Sir/Mam,can an internal force change both K.E. and momentum of a body?(Neglect all the resisting forces.)

When dough is kneaded, it changes its shape due to :

4. Work energy power A man pulls a bucket full of water from h metre deep well If the mass of the rope is m and the mass of the bucket with water is M Then work done by the man is

Why do magnetic lines start from north to south outside the magnet? Why not from south to north?

if distance travelled by a particle is 10min 10s then find its speed

Why resonance does not operate in meta position

if momentum is increase by 200% then % change in kinetic energy.

A man weight mg in rocket accelerating upward with acceleration 4g. apparent weight of man is what

The CGS unit of force is ______

In the circuit shown below, the ammeter and the voltmeter readings are 3 A and 6 V respectively. Then the value of the resistance R is

What is the difference between grounding and earthing?

A radioactive element 23592X is bombarded with a neutron, it generates 8936Y, three neutrons and A56Z.The value of A is

Name the form of energy which a wound up watch spring possesses.

If the displacement of a particle is zero, then what can you say about the distance covered by it?

How is sunlight responsible for wind energy?

Two particles A and B initially at rest, move towards each other by mutual force of attraction. At the instant when the speed of A is v and the speed of B is 2v, the speed of the centre of mass of the system is

a stone is tied to on e end of string 50cm long and is whirled in a horizontal circle with cons†an t speed if the stone makes 10 revolution in20sec then what is the magnitude of acceleration of the stone

Two waves of amplitude A and 2A interfere at a point, with a phase difference of π/3. What is the phase difference between the resul†an t amplitude and the wave of amplitude A

A ball is dropped from the top of a tower of unknown height. If the ball travels 35 m in the last second of its journey, find the height of the tower. ​ (Take g=10 ms−2)

Question 5If the moon attracts the earth, why does the earth not move towards the moon?

a particle of mass 'm' moves on the axis of a ribg of radius R and mass M.if particle at rest released from P then its kinetic energy at centre c will b

How can we determine the speed of an object from its distance time graph?

A body of mass 10 kg is moving with a velocity 4 m/s. If P is the momentum associated with the body and K.E. is the kinetic energy. Then K.E. and P are:

The wavelength of light is 589 nm. What is its wavelength in A∘ ?

(a) State the principle of flotation. (b) A floating boat displaces water weighing 6000 newtons. (i) What is the buoyant force on the boat ? (ii) What is the weight of the boat ?

What is Jahn Teller Effect??

What is the condition for a force to do work on a body ?

Which of the following is the infrared wavelength? (1) 10^{-4} cm (2) 10^{-5} cm (3) 10^{-6}cm (4) 10^- cm

refrigerator works between 4^°C and 30^°C. It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is [Take 1 cal = 4.2 joules)

Why oxygen is not considered a green house gas

Which of the following represents electrical power dissipated in an electrical circuit?

Is work a vector or scalar quantity .prove this

Explain why the value of g is zero at the centre of the earth.

What will happen if you accidentally break a magnet? [2 MARKS]

an electric geyser consumes 3.2 units of electric energy per hour of its use calculate the power rating of this device and calculate its resis†an ce

Define freefall

A rod is placed along the line, y= 2x with its centre at origin. The moment of inertia of the rod is maximum about (a) X-axis(c) Z-axis(b) Y-axis(d) Data insufficient

A boy sitting on the top most berth in the compartment of a train which is just going to stop on a railway station, drops an apple aiming at the open hand of his brother situated vertically below his hands at a { distance of about 2m . The apple will fall-

A ball is thrown vertically upwards at speed of 20 m s−1. Find the time taken by the ball to reach back to the original position. [Take acceleration die to gravity, g=10 m s−2]

A theif running on a train with 12km/h . The police car moving with 80 km/h . If the speed of the train is 60 km/h .what is the speed of theif w.r.t police car?

Two rods of equal length and mass are placed at an angle theta where will be centre of mass

A stone is dropped from the top of a building 200 m high and at the same time another stone is thrown vertically Upward from the ground with a velocity of 50 m/s. Find where and when the two stones will meet

An object of mass 100 kg is accelerated uniformly from a velocity of 5 m/s to 8 m/s in 6 s. Calculate the initial and final momentum of the object

A ball is dropped from the top of a tower of unknown height. If the ball travels 35 m in the last second of its journey, find the height of the tower. (Take g=10 ms−2)