How much Heat is produced when a resistor of 5 ohm is connected across a 10 V Battery for 5 s.

50 J

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100 J

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200 J

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150 J

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Solution

The correct option is A 100 J
By Joule's Law, Heat Produced
$Q = I^{2} R t$ ...................(1)
By Ohm's Law,
$V = I R$ .................(2)
From (1) and (2),
$Q = V^{2} t / R$
$= 10^{2} \times 5 / 5$
$= 100 J$

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