Equivalent resistance for 2 resistors in parallel:
Equivalent resistance for resistors in series:
The 40Ω and 10Ω resistors are in parallel.
They are all in series with the 4.0Ω resistor.
Req = 4.0 + (40)(10)/(40 + 10) = 12Ω
From Ohm's law, current, i = V/R
Determine the power dissipated by the 40 ohm resistor in the circuit shown. (the values from left to right at 4.0 ohm, 40 ohm, 10 ohm, 18V)
Possible answers are
1. 9.0 W
2. 27 W
3. 4.5 W
4. 3.6 W
Please show your work.
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