Quiz on Electric Current (General Science)

1. Why is the direction of the current in an electric motor reversed after every half round?

2. How can the strength of an electro-magnet be increased?

3. What is the principle of an electric motor?

4. Why is there a key in an electrical circuit?

5. Why in an electric bell, the electric currents stop again and again?

6. Why are electrical switches made of plastic?

7. When was the Leclanche cell made?

8. Which cell is also called lithium cell?

9. Who gets the credit for the experiment of electro-magnetic induction?

10. What gives protection from electrical current?

Originally posted 2015-11-24 11:17:55.