Unit 15: Electrostatics

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Question 1 of 10 0% read

1. Which gas is commonly used in fluorescent tubes?

A Oxygen

B Nitrogen

C Neon

D Carbon dioxide

2. Unit of electric charge is:

A Ampere

B Volt

C Coulomb

D Ohm

3. Which device protects buildings from lightning?

A Transformer

B Lightning rod

C Fuse

D Circuit breaker

4. Like charges:

A Attract each other

B Repel each other

C Remain neutral

D Disappear

5. 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

6. When a charged body is earthed, it becomes:

A More charged

B Negatively charged

C Neutral

D Positively charged

7. Charging a body without touching it is called:

A Charging by friction

B Charging by conduction

C Charging by induction

D Charging by earthing

8. Unlike charges:

A Repel each other

B Destroy each other

C Attract each other

D Become neutral

9. An electroscope can be used to determine:

A Amount of current

B Type of charge

C Resistance

D Voltage

10. Static charges are produced mainly by:

A Chemical reactions

B Friction

C Heating

D Radiation

Unit 15: Electrostatics

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