A) 19.2 W
B) 19.2 kW
C) 19.2 J
D) 12.2 kW
Correct Answer: B
Solution :
[b] Total resistance \[R=\left( 0.5\text{ }\Omega /km \right)\times \left( 150km \right)=75\Omega \] Total voltage drop \[=\left( 8V/km \right)\times \left( 150km \right)=1200V\] Power loss \[~=\frac{{{\left( \Delta V \right)}^{2}}}{R}=\frac{{{\left( 1200 \right)}^{2}}}{75}W\] \[=19200W=19.2kW\]
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