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Question
How much heat is generated when current I is passed through a resistor for time t?
How much heat is generated when current I is passed through a resistor for time t?
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Solution
The correct option is D I2Rt
When an electric charge Q moves against a potential V, the amount of work done is given by, W = Q × V,
Q = I × t,
From ohm’s law, V = IR
W = I2 × R × t
When all the electrical energy is converted into heat energy, we have
W = H = I2 ×R × t
I2Rt
When an electric charge Q moves against a potential V, the amount of work done is given by, W = Q × V,
Q = I × t,
From ohm’s law, V = IR
W = I2 × R × t
When all the electrical energy is converted into heat energy, we have
W = H = I2 ×R × t
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