Question 8 (c) When current is switched ‘on’ in a room heater, it ___.
When current is switched ‘on’ in a room heater, due to the heating effect of electric current, the coil inside the heater heats up and warms up the room.
Fill in the blanks:
(a) Longer line in the symbol for a cell represents its_________terminal.
(b) The combination of two or more cells is called a _________.
(c) When current is switched ‘on’ in a room heater, it __________.
(d) The safety device based on the heating effect of electric current is called a _________.