Electricity and Circuits Worksheet-1

Electricity and Circuits Worksheet-1

1. The metal disc provided at one end of the common cell is the 

(a) Switch

(b) Positive terminal

(c) Negative terminal

(d) Spring

2. In a circuit having one bulb, another bulb is added. Then the bulbs will

(a) Not glow

(b) Glow but less brightly

(c) Glow more brightly

(d) Get fused

3. Which of the following statements is/are correct?

(i) Electricity  is a form of energy.

(ii) Electric current can flow through the brick walls of a house.

(iii) The metal electric wires can be replaced with plastic ones to allow flow of current.

(iv) Electrical energy can be converted to chemical energy.

(a) (i) & (ii)

(b) (iii) & (iv)

(c) (i) & (iv)

(d) (ii) & (iii)

4. Which of the following statements is/are wrong?

(i) Human body is a bad conductor of electricity.

(ii) The air gap surrounding an electric circuit acts as an insulator

(iii) A battery always has two terminals.

(iv) When electricity lights up a bulb, no heat is produced

(a) (i) & (ii)

(b) (iii) & (iv)

(c) (i) & (iv)

(d) (ii) & (iii)

5. Electric heaters used for cooking have the filament or the heating coil on a plate made up of clay because

(a) Clay can be mould in any shape

(b) Clay is a bad conductor of electricity

(c) Both Clay can be mould in any shape & Clay is a bad conductor of electricity

(d) None of these

6. There is a mistake in the following classification. Which of the following is placed incorrectly in the groups?

(a) Wool

(b) Carbon

(c) Iron

(d) Silver

7. Most of the electricity carrying wires near highways do not have a plastic covering like the wires used at homes. But there is no substantial loss of energy because

(a) Air is a bad insulator of electricity

(b) Air is a bad conductor of electricity

(c) Electricity flows very fast near highways

(d) Both Air is a bad conductor of electricity & Electricity flows very fast near highways

8. The main function of a switch is to

(a) Allow charges to flow

(b) Complete or break a circuit

(c) Make the bulb glow easily

(d) Prevent electric shocks

9. A tester is used by the electrician to determine

(a) The presence of electric current

(b) The temperature

(c) The amount of electric current

(d) The rate of flow of electric current

10. Electric wires are covered with

(a) Conducting material

(b) Insulating material

(c) Semi conductor material

(d) None of these

Answer Key:

(1)–(c); (2)–(b); (3)–(c); (4)–(c); (5)–(b); (6)–(b); (7)–(b); (8)–(b); (9)–(a); (10)–(b)