Resistivity of copper is 1.7×10−8
Wire diameter=1.5mm⟹radius=7.5×10−4m
Wire length=25m
Voltage applied across=50V
a) Resistance of the wire(R)=ρal=1.7×10−8π×(7.5×10−4)225
R=0.2405Ω
b) Current(I)=RV=0.240550=207.9A
c) Power dissipated=I2R=(207.9)2×0.2405=10394.989W
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