13232 + Interview Questions in Physics Page 84 InterviewSolution

4151.	How does the constriction near the bulb in a clinical thermometer help in measuring body temperature accurately?
Answer» How does the constriction near the bulb in a clinical thermometer help in measuring body temperature accurately?

Discussion

4152.	Pl show the area of aperture in sperical mirror.What is meant by intensity of image is proportional to area of aperture
Answer» Pl show the area of aperture in sperical mirror. What is meant by intensity of image is proportional to area of aperture

Discussion

4153.	31. A block of mass m is placed on a smooth hemispherical movable body of mass m. The system is initially at rest. Now the block is gently disturbed. Angle alpha with the vertical, at which the block leaves the contact with the hemisphere
Answer» 31. A block of mass m is placed on a smooth hemispherical movable body of mass m. The system is initially at rest. Now the block is gently disturbed. Angle alpha with the vertical, at which the block leaves the contact with the hemisphere

Discussion

4154.	Is there any rearrangement in Markovnikov addition?
Answer» Is there any rearrangement in Markovnikov addition?

Discussion

4155.	S.I. unit of wavelength of a wave is:-
Answer» S.I. unit of wavelength of a wave is:-

Discussion

4156.	61.A block of mass 1 kg is pressed against a vertical wall by applying a horizontal force of hundred Newton the net force by the wall on the block is nearly 1.) 128N 2.) 112N 3.) 95N
Answer» 61.A block of mass 1 kg is pressed against a vertical wall by applying a horizontal force of hundred Newton the net force by the wall on the block is nearly 1.) 128N 2.) 112N 3.) 95N

Discussion

4157.	If a man of mass M jumps to the ground from a height h and his centre of mass moves a dis†an ce x in the time taken by him to hit the ground then the average force acting on him is ?
Answer» If a man of mass M jumps to the ground from a height h and his centre of mass moves a dis†an ce x in the time taken by him to hit the ground then the average force acting on him is ?

Discussion

4158.	A spherical source of 8 pie watt & frequency, 500 Hz is emitting sound waves, then what is the intensity of sound waves at a distance of 100 m
Answer» A spherical source of 8 pie watt & frequency, 500 Hz is emitting sound waves, then what is the intensity of sound waves at a distance of 100 m

Discussion

4159.	58. A truck of mass 500kg is moving with constant speed 10m/s .If sand is dropped into the truck at the constant rate 10kg/min .The force required to maintain the motion with constant velocity is 1) 3/2B 2) 5/4N 3) 7/5N 3) 5/3N Click here to view details:
Answer» 58. A truck of mass 500kg is moving with constant speed 10m/s .If sand is dropped into the truck at the constant rate 10kg/min .The force required to maintain the motion with constant velocity is 1) 3/2B 2) 5/4N 3) 7/5N 3) 5/3N Click here to view details:

Discussion

4160.	51 Prove this relationship between the vapour density and the molecular weight of gases. Molecular weight of gas = 2 vapour density of gas
Answer» 51 Prove this relationship between the vapour density and the molecular weight of gases. Molecular weight of gas = 2 vapour density of gas

Discussion

4161.	Define the following terms:a) Amplitudeb) Time period c) Frequency
Answer» Define the following terms: a) Amplitude b) Time period c) Frequency

Discussion

4162.	If the velocity of a body changes uniformly from u to v in time t, the sum of average velocity and acceleration is:
Answer» If the velocity of a body changes uniformly from u to v in time t, the sum of average velocity and acceleration is:

Discussion

4163.	Why do we feel weightlessness during free fall?
Answer» Why do we feel weightlessness during free fall?

Discussion

4164.	A balloon rises from rest with a cons†an t acceleration g/8 A stone is released from it when it has risen to heihht h the time taken by the stone to reach the ground is
Answer» A balloon rises from rest with a cons†an t acceleration g/8 A stone is released from it when it has risen to heihht h the time taken by the stone to reach the ground is

Discussion

4165.	Identify the lightning conductor and the copper plate in figure and explain what they are designed for?
Answer» Identify the lightning conductor and the copper plate in figure and explain what they are designed for?

Discussion

4166.	The relation between time period of wave (T) and frequency (f ) is given by
Answer» The relation between time period of wave (T) and frequency (f ) is given by

Discussion

4167.	There are two charges Q1 and Q2. On the basis of coulomb's law. Draw the following graphs: a.F vs 1/r b.F vs r c. F vs r^2 d. F vs 1/r^2 {if (1)they are like charges (2)they are unlike charges}
Answer» There are two charges Q1 and Q2. On the basis of coulomb's law. Draw the following graphs: a.F vs 1/r b.F vs r c. F vs r^2 d. F vs 1/r^2 {if (1)they are like charges (2)they are unlike charges}

Discussion

4168.	83.How much heat would be absorbed by two litre of an ideal gas at 5 atm pressure if it expands isothermally into an evacuated flask of five litres?
Answer» 83.How much heat would be absorbed by two litre of an ideal gas at 5 atm pressure if it expands isothermally into an evacuated flask of five litres?

Discussion

4169.	Why does and object has zero weight during free fall or falling towards center of earth ?
Answer» Why does and object has zero weight during free fall or falling towards center of earth ?

Discussion

4170.	In a sewing machine, a wheel is rotated to move the needle. Then,
Answer» In a sewing machine, a wheel is rotated to move the needle. Then,

Discussion

4171.	A ship was moving at a speed of 500 ms−1 and it attained speed of 600 ms−1 in 5 seconds. What is the acceleration of the ship?
Answer» A ship was moving at a speed of $500 m s^{- 1}$ and it attained speed of 600 $m s^{- 1}$ in 5 seconds. What is the acceleration of the ship?

Discussion

4172.	The function of diaphragm or cone in moving coil loudspeaker is to
Answer» The function of diaphragm or cone in moving coil loudspeaker is to

Discussion

4173.	A ring of radius R carries a charge +q. A test charge −q0 is released on its axis at a distance √3R from its center. How much kinetic energy will be acquired by the test charge when it reaches at the center of the ring-
Answer» A ring of radius $R$ carries a charge $+ q$ . A test charge $- q_{0}$ is released on its axis at a distance $\sqrt{3 R}$ from its center. How much kinetic energy will be acquired by the test charge when it reaches at the center of the ring-

Discussion

4174.	A stone of 1 kg is thrown with a velocity of 20ms across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?
Answer» A stone of 1 kg is thrown with a velocity of $20 \frac{m}{s}$ across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?

Discussion

4175.	I saw individual stars, but I could not distinguish the they belonged to. Then dawn came and put out all my stars.Therefore constellation means___________________.
Answer» I saw individual stars, but I could not distinguish the they belonged to. Then dawn came and put out all my stars. Therefore constellation means___________________.

4175.

I saw individual stars, but I could not distinguish the they belonged to. Then dawn came and put out all my stars.Therefore constellation means___________________.

Answer»

I saw individual stars, but I could not distinguish the they belonged to. Then dawn came and put out all my stars.

Therefore constellation means___________________.

Discussion

4176.	In the given circuit, the value of current (in mA) in the wire between points A and B will be
Answer» In the given circuit, the value of current (in $mA$ ) in the wire between points $A$ and $B$ will be

Discussion

4177.	Newtons first law
Answer» Newtons first law

Discussion

4178.	How can a karate player break a pile of tiles or a slab of ice with a single blow of his hand?
Answer» How can a karate player break a pile of tiles or a slab of ice with a single blow of his hand?

Discussion

4179.	when a force F acts on a particle of mass m the acceleration of particle becomes a now if two forces of magnitude 3F and 4F acts on the particle simaltaneously as shown in figure . then acceleration of particle is
Answer» when a force F acts on a particle of mass m the acceleration of particle becomes a now if two forces of magnitude 3F and 4F acts on the particle simaltaneously as shown in figure . then acceleration of particle is

Discussion

4180.	Pick out the option which is not an application of Archimedes principle.
Answer» Pick out the option which is not an application of Archimedes principle.

Discussion

4181.	27.If body is accelerating from rest to angular velocity of 45 revolutions/min in a time of 1.6 seconds , then its angular acceleration will be
Answer» 27.If body is accelerating from rest to angular velocity of 45 revolutions/min in a time of 1.6 seconds , then its angular acceleration will be

Discussion

4182.	An electric train is moving with a velocity of 120 km/hr. How much distance will it cover in 30 sec?
Answer» An electric train is moving with a velocity of 120 km/hr. How much distance will it cover in 30 sec?

Discussion

4183.	A body is moving in a straight line with initial velocity u and uniform acceleration a. Sum of the distances travelled in nth and (n+1)th seconds is 50 m. If v is its velocity after n seconds and u=5 m/s, then vu is
Answer» A body is moving in a straight line with initial velocity $u$ and uniform acceleration $a$ . Sum of the distances travelled in $n^{th}$ and $(n + 1)^{th} seconds$ is $50 m$ . If $v$ is its velocity after $n seconds$ and $u = 5 m/s$ , then $\frac{v}{u}$ is

Discussion

4184.	a body is thrown horizontally from a tower 100m high at t=0with a velocity 10m/s .The velocity of the body is directed at an angle 45degree with the horizontal at a time equ al to
Answer» a body is thrown horizontally from a tower 100m high at t=0with a velocity 10m/s .The velocity of the body is directed at an angle 45degree with the horizontal at a time equ al to

Discussion

4185.	Given are the velocity-time graphs of four particles. In which of the cases the displacement of the particle is zero at time t?
Answer» Given are the velocity-time graphs of four particles. In which of the cases the displacement of the particle is zero at time t?

Discussion

4186.	2 newton law
Answer» 2 newton law

Discussion

4187.	If the moon attracts the earth, why does the earth not move towards the moon?
Answer» If the moon attracts the earth, why does the earth not move towards the moon?

Discussion

4188.	On a 200 km track,a train travelles first 50 km at a uniform speed of 40 km/h. How fast should it travel the next 150 km to maintain an average speed of 60 km/h for the whole journey
Answer» On a 200 km track,a train travelles first 50 km at a uniform speed of 40 km/h. How fast should it travel the next 150 km to maintain an average speed of 60 km/h for the whole journey

Discussion

4189.	Temperature of a diatomic gas is 300 K. If moment of inertia of its molecules is 8.28 × 10–38 gm - cm2, root mean square angular velocity is –A. 1012 rad/sB. √10 × 108 rad/sC. √1.5 × 1012 rad/sD. √15 × 108 rad/s.
Answer» Temperature of a diatomic gas is 300 K. If moment of inertia of its molecules is 8.28 × 10–38 gm - cm2, root mean square angular velocity is – A. 1012 rad/s B. √10 × 108 rad/s C. √1.5 × 1012 rad/s D. √15 × 108 rad/s.

Discussion

4190.	The mass of a solid iron cube of side 3 cm is to be determined using a spring balance. If the density of iron is approximately 8.5 g/cm3, the best-suited spring balance for determining weight of the solid would be of
Answer» The mass of a solid iron cube of side 3 cm is to be determined using a spring balance. If the density of iron is approximately 8.5 g/cm³, the best-suited spring balance for determining weight of the solid would be of

4190.

The mass of a solid iron cube of side 3 cm is to be determined using a spring balance. If the density of iron is approximately 8.5 g/cm3, the best-suited spring balance for determining weight of the solid would be of

Answer»

The mass of a solid iron cube of side 3 cm is to be determined using a spring balance. If the density of iron is approximately 8.5 g/cm³, the best-suited spring balance for determining weight of the solid would be of

Discussion

4191.	What do you mean by diffused light
Answer» What do you mean by diffused light

Discussion

4192.	What is average acceleration? The formula is Va-Vb/total time but is knowing this enough?
Answer» What is average acceleration? The formula is Va-Vb/total time but is knowing this enough?

Discussion

4193.	Question 20A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
Answer» Question 20 A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.

Discussion

4194.	What is the numerical value of gravitational constant?
Answer» What is the numerical value of gravitational constant?

Discussion

4195.	44.Mption of charged particle inagnetic field and fin relations between v,r,t,,and r at a given tine
Answer» 44.Mption of charged particle inagnetic field and fin relations between v,r,t,,and r at a given tine

Discussion

4196.	Question 12 The weight of an object at the center of the earth of radius R is (a) zero (b) infinite (c) R times the weight at the surface of the earth (d) 1R2 times the weight at surface of the earth
Answer» Question 12 The weight of an object at the center of the earth of radius R is (a) zero (b) infinite (c) R times the weight at the surface of the earth (d) $\frac{1}{R^{2}}$ times the weight at surface of the earth

Discussion

4197.	Can a matter having uniform velocity have acceleration?
Answer» Can a matter having uniform velocity have acceleration?

Discussion

4198.	What is the flaw in Aristotle's statement about motion?
Answer» What is the flaw in Aristotle's statement about motion?

Discussion

4199.	(THIS IS AN ASSET QUESTION - NOT GRAVITATION CHAPTER) A light year is the distance travelled by light in a year. If ckm/sec is the speed of light, the ratio (1 light minute/1 light second) is ______________. (A) c60 km (B) c/60 km/sec (C) 60 (D) 60/c years
Answer» (THIS IS AN ASSET QUESTION - NOT GRAVITATION CHAPTER) A light year is the distance travelled by light in a year. If ckm/sec is the speed of light, the ratio (1 light minute/1 light second) is ______________. (A) c60 km (B) c/60 km/sec (C) 60 (D) 60/c years

4199.

(THIS IS AN ASSET QUESTION - NOT GRAVITATION CHAPTER) A light year is the distance travelled by light in a year. If ckm/sec is the speed of light, the ratio (1 light minute/1 light second) is ______________. (A) c60 km (B) c/60 km/sec (C) 60 (D) 60/c years

Answer»

(THIS IS AN ASSET QUESTION - NOT GRAVITATION CHAPTER)

A light year is the distance travelled by light in a year. If c*km/sec is the speed of light, the ratio (1 light minute/1 light second) is ______________.

(A) c*60 km

(B) c/60 km/sec

(C) 60

(D) 60/c years

Discussion

4200.	what will be escapepeed from a planet of mass 6×10^{16}kg and radius 3.6×10^4m
Answer» what will be escapepeed from a planet of mass 6×10^{16}kg and radius 3.6×10^4m

Discussion

Explore topic-wise InterviewSolutions in .

How does the constriction near the bulb in a clinical thermometer help in measuring body temperature accurately?

Pl show the area of aperture in sperical mirror.What is meant by intensity of image is proportional to area of aperture

31. A block of mass m is placed on a smooth hemispherical movable body of mass m. The system is initially at rest. Now the block is gently disturbed. Angle alpha with the vertical, at which the block leaves the contact with the hemisphere

Is there any rearrangement in Markovnikov addition?

S.I. unit of wavelength of a wave is:-

61.A block of mass 1 kg is pressed against a vertical wall by applying a horizontal force of hundred Newton the net force by the wall on the block is nearly 1.) 128N 2.) 112N 3.) 95N

If a man of mass M jumps to the ground from a height h and his centre of mass moves a dis†an ce x in the time taken by him to hit the ground then the average force acting on him is ?

A spherical source of 8 pie watt & frequency, 500 Hz is emitting sound waves, then what is the intensity of sound waves at a distance of 100 m

58. A truck of mass 500kg is moving with constant speed 10m/s .If sand is dropped into the truck at the constant rate 10kg/min .The force required to maintain the motion with constant velocity is 1) 3/2B 2) 5/4N 3) 7/5N 3) 5/3N Click here to view details:

51 Prove this relationship between the vapour density and the molecular weight of gases. Molecular weight of gas = 2 vapour density of gas

Define the following terms:a) Amplitudeb) Time period c) Frequency

If the velocity of a body changes uniformly from u to v in time t, the sum of average velocity and acceleration is:

Why do we feel weightlessness during free fall?

A balloon rises from rest with a cons†an t acceleration g/8 A stone is released from it when it has risen to heihht h the time taken by the stone to reach the ground is

Identify the lightning conductor and the copper plate in figure and explain what they are designed for?

The relation between time period of wave (T) and frequency (f ) is given by

There are two charges Q1 and Q2. On the basis of coulomb's law. Draw the following graphs: a.F vs 1/r b.F vs r c. F vs r^2 d. F vs 1/r^2 {if (1)they are like charges (2)they are unlike charges}

83.How much heat would be absorbed by two litre of an ideal gas at 5 atm pressure if it expands isothermally into an evacuated flask of five litres?

Why does and object has zero weight during free fall or falling towards center of earth ?

In a sewing machine, a wheel is rotated to move the needle. Then,

A ship was moving at a speed of 500 ms−1 and it attained speed of 600 ms−1 in 5 seconds. What is the acceleration of the ship?

The function of diaphragm or cone in moving coil loudspeaker is to

A ring of radius R carries a charge +q. A test charge −q0 is released on its axis at a distance √3R from its center. How much kinetic energy will be acquired by the test charge when it reaches at the center of the ring-

A stone of 1 kg is thrown with a velocity of 20ms across the frozen surface of a lake and comes to rest after travelling a distance of 50 m. What is the force of friction between the stone and the ice?

I saw individual stars, but I could not distinguish the they belonged to. Then dawn came and put out all my stars.Therefore constellation means___________________.

In the given circuit, the value of current (in mA) in the wire between points A and B will be

Newtons first law

How can a karate player break a pile of tiles or a slab of ice with a single blow of his hand?

when a force F acts on a particle of mass m the acceleration of particle becomes a now if two forces of magnitude 3F and 4F acts on the particle simaltaneously as shown in figure . then acceleration of particle is

Pick out the option which is not an application of Archimedes principle.

27.If body is accelerating from rest to angular velocity of 45 revolutions/min in a time of 1.6 seconds , then its angular acceleration will be

An electric train is moving with a velocity of 120 km/hr. How much distance will it cover in 30 sec?

A body is moving in a straight line with initial velocity u and uniform acceleration a. Sum of the distances travelled in nth and (n+1)th seconds is 50 m. If v is its velocity after n seconds and u=5 m/s, then vu is

a body is thrown horizontally from a tower 100m high at t=0with a velocity 10m/s .The velocity of the body is directed at an angle 45degree with the horizontal at a time equ al to

Given are the velocity-time graphs of four particles. In which of the cases the displacement of the particle is zero at time t?

2 newton law

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

On a 200 km track,a train travelles first 50 km at a uniform speed of 40 km/h. How fast should it travel the next 150 km to maintain an average speed of 60 km/h for the whole journey

Temperature of a diatomic gas is 300 K. If moment of inertia of its molecules is 8.28 × 10–38 gm - cm2, root mean square angular velocity is –A. 1012 rad/sB. √10 × 108 rad/sC. √1.5 × 1012 rad/sD. √15 × 108 rad/s.

The mass of a solid iron cube of side 3 cm is to be determined using a spring balance. If the density of iron is approximately 8.5 g/cm3, the best-suited spring balance for determining weight of the solid would be of

What do you mean by diffused light

What is average acceleration? The formula is Va-Vb/total time but is knowing this enough?

Question 20A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.

What is the numerical value of gravitational constant?

44.Mption of charged particle inagnetic field and fin relations between v,r,t,,and r at a given tine

Question 12 The weight of an object at the center of the earth of radius R is (a) zero (b) infinite (c) R times the weight at the surface of the earth (d) 1R2 times the weight at surface of the earth

Can a matter having uniform velocity have acceleration?

What is the flaw in Aristotle's statement about motion?

(THIS IS AN ASSET QUESTION - NOT GRAVITATION CHAPTER) A light year is the distance travelled by light in a year. If c*km/sec is the speed of light, the ratio (1 light minute/1 light second) is ______________. (A) c*60 km (B) c/60 km/sec (C) 60 (D) 60/c years

what will be escapepeed from a planet of mass 6×10^{16}kg and radius 3.6×10^4m

(THIS IS AN ASSET QUESTION - NOT GRAVITATION CHAPTER) A light year is the distance travelled by light in a year. If ckm/sec is the speed of light, the ratio (1 light minute/1 light second) is ______________. (A) c60 km (B) c/60 km/sec (C) 60 (D) 60/c years