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January 28, 2015

January 28, 2015

Posted by **Nilan** on Wednesday, May 18, 2011 at 10:20pm.

The circuit voltage is 180 volts.

Find:

the voltage of the parallel circuit

the voltage across the parallel circuit

the current through the 10 ohm resistor

- physics - need help -
**drwls**, Wednesday, May 18, 2011 at 11:46pmThe two parallel resistors behave like a single serives resistor of equivalent resistance Req

1/Req = 1/30 + 1/60 = 1/20

So Req = 20 ohms

The total circuit current is

V/R = 180/(20 + 10) = 6 Amps

The voltage drop is 60 V across the 10 ohm resistor and 120 V across the pair of parallel resistors. You seem to be asking the same question twice.

All of the circuit current (6A) goes through the 10 ohm resistor

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