A 1M ohm resistor is connected for 1 min when a potential difference of 1 kilo volt is applied. What will be the heat developed in resistor ?
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A Joule is the unit of heat is watt second.
1M, 1V, 1min (60seconds)
Current through the resistance of 1M= 1V/1M = 1 micro amp 1 X 10^-6 Amps.
Heat dissipated 1 X 1 X 1 (10^-6 x 10^-6 x 10^6) SI units so the unit is a Joule.
= 1 micro watt for 60 second ie 60 micro Joule and this will be the heat energy dissipation.
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