220 J of heat is produced each second in a 8 ohm resistor. Find the potential difference across the resistor.
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1
HEAT = I²RT
I×IRT
SINCE, V = IR
HEAT = IVT
220 = V/R × VT
220 = V²T/R
220×8/1 = V²
v =
V = 42
Answered by
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Heat produced = 220J (Given)
Time = 8 sec (Given)
Heat = I² RT joules
According to ohm's law V=IR
So I = V/R
Substituting I we get
V²/ R² × RT joules
= V²T/R joules
= 220 = V² × 1 sec/ 8 ohms
= 220 × 8 = v²
= ~ 44
Thus, the potential difference across the resistor is 44
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