400j of heat is produced is 4s in a 4ohm resistor. find pd. across the resistor
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Given,
Heat=400 J
Time=4s
Resistance=4Ω
To find=Potential Difference
We know that,
H=I²Rt
H=(V/R)²Rt
H=V²t/R
V² = HR/t
V = (400×4/4
V = 20 V
Heat=400 J
Time=4s
Resistance=4Ω
To find=Potential Difference
We know that,
H=I²Rt
H=(V/R)²Rt
H=V²t/R
V² = HR/t
V = (400×4/4
V = 20 V
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