Activity 3:
Read each item carefully. Choose the letter of the correct answer.
1. Electric conductors are materials and substances that allow electricity to pass through them. Which one of
the following is a good conductor?
A. Cloth B. Paper C. Wood D. Iron
2. Which of the following is an example of an insulator?
A. wooden block B. paper clip
C. steel
D. penny
3. Why are electric wires coated in plastic or rubber?
A. to keep you from getting electrocuted C. for decoration
B. to prevent you from freezing
D. It is cheaper
4. Which of the following is the most conductive element?
A. Iron
B. Copper
C. Silicon
D. Silver
5. Which among the following is not an insulator?
A. Wool
B. Plastic
C. Silver
D. Paper
6. The energy gap is maximum in
A. Insulators
B. Conductors C. Semiconductors D. Superconductors
7. Conductors are materials that
A. Allows cold to flow
C. Does not allow heat to flow
B. Allow the flow of heat
D. Stops cold from passing through
8. Why is copper a preferred choice in making electrical wires?
A. Copper is a good conductor of electricity C. Superconductors
B. Poor conductors of electricity
D. Insulators
9. The electrician is wearing rubber gloves for protection. The purpose of the rubber gloves is to -
A. produce electricity
C. keep the electrician dry
B. insulate the electrician
D. create an electrical circuit
10. What material would be safest to use as an insulator to cover electrical wires?
A. Tin
B. Water
C. Rubber
D. Aluminum
Share
Answer:
1:D
3:A
5:D
8:A
9:B
10:C
Explanation:
Hope it helps