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Question

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 _________.

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Solution

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

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

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

(c) When current is switched ‘on’ in a room heater, it __produces heat__.

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

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

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


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