Electrostatics – LearnITbyTests

1. Materials which gain electrons become?

Positively charged

Negatively charged

Neutral

no idea

Question 1 of 18

2. Mention 3 methods of charging a material?

Induction

By contact

By separation

All of the above

Question 2 of 18

3. What of the following statements is a valid description of an electroscope?

An instrument which works on the principle of reflection of light on curved surface

An instrument which works on the principle of reflecting light on a plane mirror

An instrument which works on the principle of electrostatic charges

All of the above

Question 3 of 18

4. Electrostatics is the study of static charges. True or False?

True

False

Maybe

None

Question 4 of 18

5. Mention the dangers of Electrostatics

The molecules of a flammable liquid flowing through a pipe may become charged due to rubbing on the inner surface of the pipe and cause an explosion.

Fuels carried in plastic cans can get charged due to rubbing and cause fire

Charged clouds cause lightening which endanger lives of people

All of the above

Question 5 of 18

6. Which of the following does not describe electrostatics?

It is a study of static charges

There are two types of charges; positive and negative charges

SI UNIT of charges is coulomb

Static electricity is a basic physical quantity

Question 6 of 18

7. Which one of the following statements does NOT describe an atom?

An atom is made up of Protons, Neutrons and Electrons.

Protons are positively charged while neutrons have no charge.

Electrons move in orbits around the nucleus and are negatively charged

There are some electrons in the nucleus of any atoms

Question 7 of 18

8. An ion is a charged atom

True

False

Maybe

None

Question 8 of 18

9. Which one of the following is not a result of the formation of static charges?

Household mirrors and windows when wiped with a dry-duster/ cloth attract dust and other small particles

When a plastic comb, plastic pen or rubber balloon is rubbed on a sleeve or hair and brought close to small particles of paper, it attracts them.

A crackling sound is heard when a nylon cloth is taken off the body.

Separating iron fillings from sand.

Question 9 of 18

10. Which among the following is not among the uses of the Electroscope?

Used to test the quantity of charges on a charged body

Used to test for insulation properties of a material

Used to detect radioactivity of particles

Used to detect the presence of charges on a body.

Question 10 of 18

11. Define the Law of electrostatics?

Like charges attract

Like charges repel

Unlike charges attract each other

no idea

Question 11 of 18

12. Name TWO ways air can be charged?

Heating and cooling

Heating and radiations

Radiations and vaporization

mutation

Question 12 of 18

13. Define earthing?

Process of losing charges

Process of removal of excess charge from an object to the earth

Process of transfer of charges to the earth

none of the mentioned

Question 13 of 18

14. Which of the following part is not in an electroscope?

Switch

Metal rod

Leaf

Brass cap

Question 14 of 18

15. When an object is charged by induction, it acquires charges that are opposite to the inducing charges?

True

False

Maybe

None

Question 15 of 18

16. Which of the following is NOT among the applications of electrostatic charges?

Electrostatic precipitation

Laser Jet printing

Spray painting

Electroplating of Ships

Question 16 of 18

17. When an object is charged by contact, it acquires charges that are similar to the contacting charges?

False

True

Maybe

None

Question 17 of 18

18. Materials which lose electrons become?

Positively charged

Negatively charged

Neutral

All of the above

Question 18 of 18

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