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iwan2learn
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1. A car, 5 km distance from a station, take 100 A over a 100 mm hard drawn copper trolley wire having a resistance of 0.270 ohm per km. The rail and ground return has a resistance of 0.06 ohm per km. If the station voltage is 750 V, what is the voltage of the car?
I think this are the relevant equations..
I assume that they are connected in series..
so Icar=Irail
Vt=V[t]station
i don't know what to do with 0.0270 and 0.06 ohms per km..
I tried solving for Vcar by Vcar=I[car]*R[car]
where in Icar=100 A and Rcar is 0.0270 ohm/km(1km/1x10^6mm)(100mm)
Vcar=2.7x10^-4.. which is obviously wrong because V[station]=750V and its impossible that the car only takes 2.7x10^-4 V.. Pls help me thanks.
Homework Equations
I think this are the relevant equations..
I assume that they are connected in series..
so Icar=Irail
Vt=V[t]station
i don't know what to do with 0.0270 and 0.06 ohms per km..
The Attempt at a Solution
I tried solving for Vcar by Vcar=I[car]*R[car]
where in Icar=100 A and Rcar is 0.0270 ohm/km(1km/1x10^6mm)(100mm)
Vcar=2.7x10^-4.. which is obviously wrong because V[station]=750V and its impossible that the car only takes 2.7x10^-4 V.. Pls help me thanks.