Physics Quiz Set 09

Question No.1

The rate of change in displacement over time is called______

1. Acceleration
2. Force
3. Speed
4. Velocity

Select Answer

Correct Answer: ( D  )  

Question No.2

Scalar is a quantity that has magnitude, but devoid of_______

1. Unit
2. Mass
3. Direction
4. None of these

Select Answer

Correct Answer: ( B )  

Question No.3

The sky appears blue due to____

1. Diffraction of light
2. Reflection of light
3. Refraction of light
4. Scattering of light

Select Answer

Correct Answer: ( D )  

Question No.4

"Consider the following : 

Statement (A). The Boiling point of water decreases with increasing height. 

Reason (R).Atmospheric pressure increases with altitude."

1. Both A and R are correct and the correct interpretation of A is R
2. Both A and R are correct but the correct interpretation of A is not R
3. A is right but R is wrong
4. A is false, but R is correct

Select Answer

Correct Answer: ( C )  

Question No.5

How much electrons should pass through a conductor in 1 second to constitute 1 ampere current, if the charge on an electron is 1.6 x 10¹⁹ coulombs?

1. 6.25×10¹⁸ electrons
2. 6.9×10¹⁸ electrons
3. 6.5×10¹⁹ electrons
4. 6.25×10¹⁵ electrons

Select Answer

Correct Answer: ( A )  

Question No.6

The strength of magnetic field produced by a current carrying solenoid does not depend on the:

1. Number of turns in the solenoid.
2.  Strength of current in the solenoid.
3. Nature of "core material" used in making solenoid.
4. None of these

Select Answer

Correct Answer: ( D )  

Question No.7

In which of the following cases the resistance of a wire gets halved?

1.  When the length of a wire is doubled.
2. When the area of cross - section of a wire is doubled.
3.  When the current gets halved.
4. All the above

Select Answer

Correct Answer: ( B  )  

Question No.8

As you move an object away from a convex mirror, its image becomes ____and moves towards ____

1. Smaller, infinity
2. Smaller, focus
3. Enlarged, infinity
4. Enlarged, focus

Select Answer

Correct Answer: ( D )  

Question No.9

Which of the following is true for a spherical mirror?

1. f = 2R
2. fR = 1/2
3. fR = 2 
4. R = 2f

Select Answer

Correct Answer: ( D )  

Question No.10

The conduction of electricity in a semiconductor is ______

1. Only electrons
2. By Holes only
3. By both electrons and holes
4. Neither by electrons nor by holes

Select Answer

Correct Answer: ( C  )  

Question No.11

Which of the following is the work done in moving a unit charge across two points in an electric circuit?

1. Current
2.  Potential difference
3. Power
4.  Resistance

Select Answer

Correct Answer: ( B )  

Question No.12

What is focal length (f) , if you have an object 2m from the concave mirror and the image is 4m from the mirror

1. 3.0 m
2. 0.8 m
3. -1.3 m
4. -4.0 m

Select Answer

Correct Answer: ( C )  

Question No.13

A Concave lens of suitable focal length is used for correcting

1. Myopic eye
2. Hypermetropic eye
3. Both of these
4. None of these

Select Answer

Correct Answer: ( A )  

Question No.14

If a convergent lens of power 6D is combined with a divergent lens of power of -16D, then what will be the focal length of the combination?

1. -0.2
2. -0.1
3. 2
4. 1

Select Answer

Correct Answer: ( B )  

Question No.15

Though the atmosphere puts a lot of pressure on us, we don't feel it because

1. Our blood pressure puts more than the pressure of the atmosphere
2. We are used to it
3. Our bones are very strong and can bear this pressure
4. The surface area of our head is very small

Select Answer

Correct Answer: ( A )  

Question No.16

Calculate the power of an electric bulb connected to a generator of 220V supplying 0.5A current.

1. 110W
2. 110V
3. 440W
4. 220W

Select Answer

Correct Answer: ( A )  

Question No.17

The speed of light going through which will be minium?

1. Glass
2. Vacuum
3. Water
4. Wind

Select Answer

Correct Answer: ( A )  

Question No.18

The air bubble in the water will behave as

1. Convex mirror
2. Convex lens
3. Concave mirror
4. Concave lens

Select Answer

Correct Answer: ( D  )  

Question No.19

The normal temperature of the human body is 98.4 °F. Its temperature is equal to

1. 40.16 °C
2. 36.89 °C
3. 35.72 °C
4. 32.36 °C

Select Answer

Correct Answer: ( B )  

Question No.20

The leaning tower of Pisa doesn't fall, because______

1. It is thin at the top
2. It covers large surface area
3. Its center of gravity stays in the lowest position
4. The vertical line from the center of gravity stays inside the floor

Select Answer

Correct Answer: ( D )  

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