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The first practical solar cell was made in the year:

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1947

1954

1960

1972

answer is B.

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Detailed Solution

The first practical solar cell was made in the year 1954.
A solar cell is a device which converts solar energy directly into electricity. The first practical solar cell was made in the year

1954

. A typical solar cell develops a voltage of

0.5 V

1 V

and can generate about

0.7 W

of electricity when exposed to the sun. Modern solar cells can provide efficiencies as high as

25 %

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