6277 + Interview Questions in Physics Page 107 InterviewSolution

5301.	The SI unit of current is
Answer» The SI unit of current is

Discussion

5302.	A metal ball of surface area 200cm2 and temperature 5270C is surrounded by a vessel at 270C. If the emissivity of the metal is 0.4, then the rate of loss of heat from the ball is σ=5.67×10−8J/m2−s−k4
Answer» A metal ball of surface area $200 c m^{2}$ and temperature $527^{0} C$ is surrounded by a vessel at $27^{0} C .$ If the emissivity of the metal is 0.4, then the rate of loss of heat from the ball is $σ = 5.67 \times 10^{- 8} J / m^{2} - s - k^{4}$

Discussion

5303.	For beats to be audible the difference in frequency of the two waves should not exceed 10Hz, why?
Answer» For beats to be audible the difference in frequency of the two waves should not exceed 10Hz, why?

Discussion

5304.	Which of the below will you use to magnify small font?
Answer» Which of the below will you use to magnify small font?

Discussion

5305.	The pressure at a point in a liquid is
Answer» The pressure at a point in a liquid is

Discussion

5306.	Name the material used for preparing an electromagnet.
Answer» Name the material used for preparing an electromagnet.

Discussion

5307.	A force of 1000N was applied to stop a car that was initially moving with a constant velocity. The car stopped after moving through 10m. How much is the magnitude of work done by the force?
Answer» A force of $1000 N$ was applied to stop a car that was initially moving with a constant velocity. The car stopped after moving through $10 m$ . How much is the magnitude of work done by the force?

Discussion

5308.	What is the Instrument used to measure the mass of an object called?
Answer» What is the Instrument used to measure the mass of an object called?

Discussion

5309.	A vector quantity has :
Answer» A vector quantity has :

Discussion

5310.	Why do we cover plug pin holes which are within the reach of children with cellotape or a plastic cover when not in use?
Answer» Why do we cover plug pin holes which are within the reach of children with cellotape or a plastic cover when not in use?

Discussion

5311.	A current through a horizontal power line flows in north to south direction. What is the direction of magnetic field (i) at a point directly below it and (ii) at a point directly above it?
Answer» A current through a horizontal power line flows in north to south direction. What is the direction of magnetic field (i) at a point directly below it and (ii) at a point directly above it?

Discussion

5312.	Question 12 Define larynx and explain its function.
Answer» Question 12 Define larynx and explain its function.

Discussion

5313.	A man looked into the plane mirror and saw the clock as shown below, what is the actual time?
Answer» A man looked into the plane mirror and saw the clock as shown below, what is the actual time?

Discussion

5314.	A long wire will have__________ of same width.
Answer» A long wire will have__________ of same width.

Discussion

5315.	Advantages of using mercury over water as barometer fluid include:
Answer» Advantages of using mercury over water as barometer fluid include:

Discussion

5316.	What do we mean by conservation of mechanical energy? State the condition when it holds.
Answer» What do we mean by conservation of mechanical energy? State the condition when it holds.

Discussion

5317.	Lunar eclipse is seen only on a ___night.
Answer» Lunar eclipse is seen only on a ___night.

Discussion

5318.	How one can change the deflection of a magnetic needle that has been kept near a current carrying wire of a circuit?
Answer» How one can change the deflection of a magnetic needle that has been kept near a current carrying wire of a circuit?

Discussion

5319.	How cyclones cause damage?
Answer» How cyclones cause damage?

Discussion

5320.	Question 3 A simple pendulum takes 32 s to complete 20 oscillations. What is the time period of the pendulum?
Answer» Question 3 A simple pendulum takes 32 s to complete 20 oscillations. What is the time period of the pendulum?

Discussion

5321.	Which of the following are fundamental physical quantities:
Answer» Which of the following are fundamental physical quantities:

Discussion

5322.	Rashmi suspended a marked magnet freely. In which direction will its North Pole point?
Answer» Rashmi suspended a marked magnet freely. In which direction will its North Pole point?

Discussion

5323.	Choose the incorrect statement for chemical changes:-
Answer» Choose the incorrect statement for chemical changes:-

Discussion

5324.	Mr. Ghosh Babu leaves his house daily at a particular time to go to his office. He reaches office 10minutes late when he travels at 20 kmph and 5 minutes early when he travels at 30 kmph. At what speed should he travel to reach office on time?
Answer» Mr. Ghosh Babu leaves his house daily at a particular time to go to his office. He reaches office 10minutes late when he travels at 20 kmph and 5 minutes early when he travels at 30 kmph. At what speed should he travel to reach office on time?

Discussion

5325.	The metal disc of an electric cell is:
Answer» The metal disc of an electric cell is:

Discussion

5326.	Which of the following is not a natural phenomenon?
Answer» Which of the following is not a natural phenomenon?

Discussion

5327.	Why concave mirror is used for shaving mirror
Answer» Why concave mirror is used for shaving mirror

Discussion

5328.	North pole of magnet points towards___ direction of geographical earth.
Answer» North pole of magnet points towards___ direction of geographical earth.

Discussion

5329.	Which terminal of a battery is at a higher potential?
Answer» Which terminal of a battery is at a higher potential?

Discussion

5330.	Alice touched the metal railings and the wooden doorknob in a room at the same time. She felt that the metal railing feels cooler than the wooden doorknob. What is the most likely explanation for this?
Answer» Alice touched the metal railings and the wooden doorknob in a room at the same time. She felt that the metal railing feels cooler than the wooden doorknob. What is the most likely explanation for this?

Discussion

5331.	A fuse should have :
Answer» A fuse should have :

Discussion

5332.	The silvered glass walls in a vacuum flask prevents transfer of heat by _______.
Answer» The silvered glass walls in a vacuum flask prevents transfer of heat by _______.

Discussion

5333.	1 m = __ cm?
Answer» 1 m = __ cm?

Discussion

5334.	Two methods to find wind direction
Answer» Two methods to find wind direction

Discussion

5335.	What is a circuit diagram?
Answer» What is a circuit diagram?

Discussion

5336.	Does wind have any other name like the cyclone
Answer» Does wind have any other name like the cyclone

Discussion

5337.	Whether the temperature of different part of body is same/ different?
Answer» Whether the temperature of different part of body is same/ different?

Discussion

5338.	The meter that measures the distance moved by the vehicle is known as
Answer» The meter that measures the distance moved by the vehicle is known as

Discussion

5339.	For the effective radiation of heat by an electric room heater, which of the following needs to be done?
Answer» For the effective radiation of heat by an electric room heater, which of the following needs to be done?

Discussion

5340.	The velocity-time graph of a train travelling between two stations, is plotted as below: Find train's average acceleration ( in m/s2 ) in each of the time intervals OX, XY and YZ respectively.
Answer» The velocity-time graph of a train travelling between two stations, is plotted as below: Find train's average acceleration ( in $m / s^{2}$ ) in each of the time intervals OX, XY and YZ respectively.

5340.

The velocity-time graph of a train travelling between two stations, is plotted as below: Find train's average acceleration ( in m/s2 ) in each of the time intervals OX, XY and YZ respectively.

Answer»

The velocity-time graph of a train travelling between two stations, is plotted as below:

Find train's average acceleration ( in $m / s^{2}$ ) in each of the time intervals OX, XY and YZ respectively.

Discussion

5341.	Dear Sir or Madam , My doubts are 1)How the lighting is formed ? 2)How water formed in our planet Earth ? And the scientists have discovered water on Mars and Moon but how the water formed? PLEASE HELP ME TO FIND OUT THE ANSWER OF THIS QUESTION
Answer» Dear Sir or Madam , My doubts are 1)How the lighting is formed ? 2)How water formed in our planet Earth ? And the scientists have discovered water on Mars and Moon but how the water formed? PLEASE HELP ME TO FIND OUT THE ANSWER OF THIS QUESTION

5341.

Dear Sir or Madam , My doubts are 1)How the lighting is formed ? 2)How water formed in our planet Earth ? And the scientists have discovered water on Mars and Moon but how the water formed? PLEASE HELP ME TO FIND OUT THE ANSWER OF THIS QUESTION

Answer»

Dear Sir or Madam ,

My doubts are

1)How the lighting is formed ?

2)How water formed in our planet Earth ? And the scientists have discovered water on Mars and Moon but how the water formed?

PLEASE HELP ME TO FIND OUT THE ANSWER OF THIS QUESTION

Discussion

5342.	What is a Speedometer? How does it work? [3 MARKS]
Answer» What is a Speedometer? How does it work? [3 MARKS]

Discussion

5343.	Two cars A and B start from a point at same time along straight line and their positions are given by XA=2t2−3t and XB=t2+2t. Find the time when relative velocity between A and B becomes zero.
Answer» Two cars A and B start from a point at same time along straight line and their positions are given by $X_{A} = 2 t^{2} - 3 t$ and $X_{B} = t^{2} + 2 t$ . Find the time when relative velocity between A and B becomes zero.

Discussion

5344.	Why should we always use glass utensils while microwaving something in the microwave and not in steel utensils?
Answer» Why should we always use glass utensils while microwaving something in the microwave and not in steel utensils?

Discussion

5345.	What is the definition of low pressure and high preassure?
Answer» What is the definition of low pressure and high preassure?

Discussion

5346.	How does the Sun produce light in vacuum?
Answer» How does the Sun produce light in vacuum?

Discussion

5347.	Joe has travelled a distance of 60 km from town A to town B in 3 hrs. And then another 40 km from town B to town C in 2 hrs. Find the average speed for his entire journey.
Answer» Joe has travelled a distance of 60 km from town A to town B in 3 hrs. And then another 40 km from town B to town C in 2 hrs. Find the average speed for his entire journey.

Discussion

5348.	What is the diameter (in cm) of a sphere whose volume is 346.5 cm3?
Answer» What is the diameter (in cm) of a sphere whose volume is 346.5 $c m^{3}$ ?

Discussion

5349.	Can we use an electromagnet for separating plastic bags from a garbage heap?
Answer» Can we use an electromagnet for separating plastic bags from a garbage heap?

Discussion

5350.	Select the phenomena that depend on the heating effect of current:
Answer» Select the phenomena that depend on the heating effect of current:

Discussion

Explore topic-wise InterviewSolutions in .

The SI unit of current is

A metal ball of surface area 200cm2 and temperature 5270C is surrounded by a vessel at 270C. If the emissivity of the metal is 0.4, then the rate of loss of heat from the ball is σ=5.67×10−8J/m2−s−k4

For beats to be audible the difference in frequency of the two waves should not exceed 10Hz, why?

Which of the below will you use to magnify small font?

The pressure at a point in a liquid is

Name the material used for preparing an electromagnet.

A force of 1000N was applied to stop a car that was initially moving with a constant velocity. The car stopped after moving through 10m. How much is the magnitude of work done by the force?

What is the Instrument used to measure the mass of an object called?

A vector quantity has :

Why do we cover plug pin holes which are within the reach of children with cellotape or a plastic cover when not in use?

A current through a horizontal power line flows in north to south direction. What is the direction of magnetic field (i) at a point directly below it and (ii) at a point directly above it?

Question 12 Define larynx and explain its function.

A man looked into the plane mirror and saw the clock as shown below, what is the actual time?

A long wire will have__________ of same width.

Advantages of using mercury over water as barometer fluid include:

What do we mean by conservation of mechanical energy? State the condition when it holds.

Lunar eclipse is seen only on a ___night.

How one can change the deflection of a magnetic needle that has been kept near a current carrying wire of a circuit?

How cyclones cause damage?

Question 3 A simple pendulum takes 32 s to complete 20 oscillations. What is the time period of the pendulum?

Which of the following are fundamental physical quantities:

Rashmi suspended a marked magnet freely. In which direction will its North Pole point?

Choose the incorrect statement for chemical changes:-

Mr. Ghosh Babu leaves his house daily at a particular time to go to his office. He reaches office 10minutes late when he travels at 20 kmph and 5 minutes early when he travels at 30 kmph. At what speed should he travel to reach office on time?

The metal disc of an electric cell is:

Which of the following is not a natural phenomenon?

Why concave mirror is used for shaving mirror

North pole of magnet points towards___ direction of geographical earth.

Which terminal of a battery is at a higher potential?

Alice touched the metal railings and the wooden doorknob in a room at the same time. She felt that the metal railing feels cooler than the wooden doorknob. What is the most likely explanation for this?

A fuse should have :

The silvered glass walls in a vacuum flask prevents transfer of heat by _______.

1 m = __ cm?

Two methods to find wind direction

What is a circuit diagram?

Does wind have any other name like the cyclone

Whether the temperature of different part of body is same/ different?

The meter that measures the distance moved by the vehicle is known as

For the effective radiation of heat by an electric room heater, which of the following needs to be done?

The velocity-time graph of a train travelling between two stations, is plotted as below: Find train's average acceleration ( in m/s2 ) in each of the time intervals OX, XY and YZ respectively.

Dear Sir or Madam , My doubts are 1)How the lighting is formed ? 2)How water formed in our planet Earth ? And the scientists have discovered water on Mars and Moon but how the water formed? PLEASE HELP ME TO FIND OUT THE ANSWER OF THIS QUESTION

What is a Speedometer? How does it work? [3 MARKS]

Two cars A and B start from a point at same time along straight line and their positions are given by XA=2t2−3t and XB=t2+2t. Find the time when relative velocity between A and B becomes zero.

Why should we always use glass utensils while microwaving something in the microwave and not in steel utensils?

What is the definition of low pressure and high preassure?

How does the Sun produce light in vacuum?

Joe has travelled a distance of 60 km from town A to town B in 3 hrs. And then another 40 km from town B to town C in 2 hrs. Find the average speed for his entire journey.

What is the diameter (in cm) of a sphere whose volume is 346.5 cm3?

Can we use an electromagnet for separating plastic bags from a garbage heap?

Select the phenomena that depend on the heating effect of current: