Half Book 1

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Question 1 of 10 0% read

1. Electric field lines never:

A Cross each other

B Start from charges

C End on charges

D Exist in space

2. The focal length of a concave lens is taken as:

A Positive

B Negative

C Zero

D Infinite

3. Corona discharge occurs when:

A Field is very weak

B Field is slightly below breakdown value

C Field is zero

D No charge is present

4. The region of high pressure in a sound wave is called:

A Rarefaction

B Compression

C Amplitude

D Frequency

5. High specific heat capacity of water helps in:

A Rapid heating

B Climate moderation

C Fast cooling

D Heat insulation

6. Which law explains force between charges?

A Ohm’s law

B Faraday’s law

C Coulomb’s law

D Newton’s law

7. Latent heat is the heat required to:

A Raise temperature

B Change state without temperature change

C Increase pressure

D Expand volume

8. Minimum distance for hearing echo in air is about:

A 5 m

B 10 m

C 17 m

D 50 m

9. When gas particles strike the walls of container, they exert:

A Heat

B Force

C Energy

D Mass

10. The part of ear that collects sound waves is:

A Cochlea

B Auditory nerve

C Ear canal

D Pinna

Half Book 1

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