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   .

Answer:

(a) Positive A cell have two terminals, one is positive and other is negative. The direction of current is from positive terminal to negative terminal.

(b) Battery
Battery is the combination of two or more cells in which positive terminal of the cell connected to the negative terminal of the another cell.

(c) Produces heat
It produces heat due to the heating effect of electric current.

(d) Fuse
Fuse limits the current in circuit and breaks the circuit, if current reaches its maximum limit.

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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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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 .