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Secondary Cells

Pick out the ...

Question

Pick out the pair in which the energy change of one is reverse of the energy change in the other :
(1) radio (2) fluorescent lamp (3) toaster (4) photoelectric cell

1 and 2

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2 and 3

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2 and 4

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3 and 4

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Solution

The correct option is D 2 and 4
In fluorescent lamp, current is used to generate light and in photoelectric cell, light is used to generate electric current:
hence, the energy change is reverse of the energy change in the other.

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