Fill in the blanks:

(a) Longer line in the symbol for cell represents its _________ terminal.

(b) The combination of two or more cells is calleda _________.

(c) Whencurrent is switched ‘on’ in a room heater, it __________ .

(d) The safety device based on the heating effectof electric current is called a _________.

(a) Longer line in the symbol for cell representsits__positive__terminal.

(b) The combination of two or more cells is calleda __battery__.

To make a battery, the negative terminal of one cell is connected tothe positive terminal of the next cell and so on.

(c) Whencurrent is switched ‘on’ in a room heater, it __producesheat__.

Working of a room heater is based on the phenomenon of heating effectof electric current.

(d) The safety device based on the heating effectof electric current is called a __fuse__.

Fuse is a safety device, which limits current in circuit and breaksthe circuit if the current exceeds its maximum limit.