Homework Help: physics

Posted by Anonymous on Saturday, January 29, 2011 at 5:39pm.

A 65.0-Ù resistor is connected in parallel with a 117.0-Ù resistor. This parallel group is connected in series with a 22.0-Ù resistor. The total combination is connected across a 15.0-V battery
Find the current in the 117.0-Ù resistor.
Find the power dissipated in the 117.0-Ù resistor

physics - Anonymous, Saturday, January 29, 2011 at 6:08pm
total resistance parallel branch:

Req=65*117/(182)= 41.8 ohms
total circuit resistance: 41.8+22=63.8 ohms

total current: 15/63.8=.235a

voltage across the parallel branch:
.235*41.8=9.82 volts

current in 117 = 9.82/117 amps

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