Questions on Electric Circuits

Q11. A pupil connects a battery, an electric bell and some wires. Her circuit is shown in the diagram.

(a) Why does the bell not ring?

1 mark

She adds a shiny steel pin as shown in the diagram below.

(b) Why does the bell ring now?

1 mark

(c) She replaces the shiny steel pin with a wooden matchstick. Why does the bell not ring?

1 mark

(d) She replaces the matchstick with a very rusty steel pin. The bell does not ring. Suggest why.

1 mark

Maximum 4 marks