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## Homework Statement

A 100 kW generator supplies power at a p.d of 10kV through cables of total resistance 5 Ohms. Calculate the supply current and the power dissipated in the cables.

## Homework Equations

P = IV

V=IR

Q=It

## The Attempt at a Solution

Supply current:

P=IV

100 kW = (I)(10kV)

I=10A

Supply current 10 A.

But I get different answers when I try to find the power dissipated in the cable.

By using this formulae , P = (V*V)/R I get a huge number which is wrong because it is more than the power generated but when I use P = ( I * I ) / R , I get the correct answer.

Think I have a misconception about this [ P = (V*V)/R ] . Can someone tell me where I am wrong? and why so? Thanks in advance. =)