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Power Sources – 1 – 1

1. Active materials of a lead-acid cell are :

(a) lead peroxide
(b) sponge lead
(c) dilute sulphuric acid
(d) all the above

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

2. During the charging of a lead-acid cell :

(a) its cathode becomes dark chocolate brown in colour
(b) its voltage increases
(c) it gives out energy
(d) specific gravity of H2SO4 is decreased

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

3. The ratio of Ah efficiency to Wh efficiency of a lead-acid cell is :

(a) always less than one
(b) just one
(c) always greater than one
(d) either (a) or (b)

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

4. The capacity of a cell is measured in :

(a) watt-hours
(b) watts
(c) amperes
(d) ampere-hours

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

5. The capacity of a lead-acid cell does NOT depend on its :

(a) rate of charge
(b) rate of discharge
(c) temperature
(d) quantity of active material

Answer
Answer : (a)

Explanation
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