State Joule's law of heating. Express it mathematically when an appliance of resistance R is connected
Electricity (10)State Joule's law of heating. Express it mathematically when an appliance of resistance R is connected to a source of voltage V and the current I flows through the appliance for a time t.
Answer
This law states that heat produced in a resistor is:
- directly proportional to the square of current for a given resistance / (H α I2)
- directly proportional to the resistance for a given current / (H α R)
- directly proportional to the time for which the current flows through the resistor / (H α t)
H = V I t
Exam Year:
2022
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