16) Static Electricity

Question 1

What types of charges are there in static electricity?

Answer 1

positive and negative charges.

Question 2

What is the SI unit for charges?

Answer 2

coulomb (C)

Question 3

Define the law of electrostatic.

Answer 3

Like charges repel.

Unlike charges attract.

Question 4

What is an electric field?

Answer 4

A region where an electric charge experience an electric force.

Question 5

What does the direction of the arrow in the electric field line represent?

Answer 5

It represent the path a positive test charge would take if placed in the electric field.

Question 6

What is the method used to charge an insulator?

Answer 6

Rubbing (also known as charging by friction or triboelectric effect)

Question 7

What is the method used to charge a conductor?

Answer 7

Charging by induction or

charging by earthing.

Question 8

What does the distance between the field lines tells you about the strength of the field?

Answer 8

The closer the lines, the stronger the field.

Question 9

Name one hazard of electrostatics.

Answer 9

Build up of charges in refuelling aircrafts and tankers or

build up of charges in a body in an environment with high concentration of oxygen.

Question 10

Name one application of electrostatics.

Answer 10

Photocopier or
Electrostatic spray painting or
electrostatic precipitator or
laser printing. 
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