Fill in the following blanks with suitable words:
(a) A current is a flow of ... For this to happen there must be a ...circuit.
(b) Current is measured in .... using an ..... placed in .... in a circuit.

Fill in the following blanks with suitable words :

(a) A fuse should always be placed in the ........... wire of a mains circuit.

(b) The earth wire should be connected to the ............ of an appliance.

Fill in the following blanks with suitable words:
(a) Potential difference is measured in _______ by using a ______ placed in_______ across a component.
(b) Copper is a good _______ while plastic is an _________.