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Two cities are 150 km apart . Electric p...

Two cities are 150 km apart . Electric power is sent from one city to another city through copper wires . The fall of potential per km is 8 volt and the averge resistance per km is `0.5Omega` .The power loss in the wire is

A

`19.2W`

B

`19.2kW`

C

`19.2J`

D

`12.2kW`

Text Solution

Verified by Experts

The correct Answer is:
B
Total resistance `=0.5xx150=75Omega`
Total voltage drop `=8xx150=1200V`
`therefore` power dissipated
`=(V^(2))/(R)=(1200)^(2)/(75)=19200W=19.2kW`
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  1. Two cities are 150 km apart . Electric power is sent from one city to ...

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