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# Problem: An L-R-C series circuit is connected to a 120 Hz ac source that has rms voltage = 90.0 V. The circuit has a resistance of 79.0 ohms and an impedance at this frequency of 105 ohms.What average power is delivered to the circuit by the source?P = ? watts

###### FREE Expert Solution

This question states that this is a series LRC type of problem.

Current (Ohm's law):

$\overline{){{\mathbf{i}}}_{{\mathbf{rms}}}{\mathbf{=}}\frac{{\mathbf{V}}_{\mathbf{rms}}}{\mathbf{Z}}}$

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###### Problem Details

An L-R-C series circuit is connected to a 120 Hz ac source that has rms voltage = 90.0 V. The circuit has a resistance of 79.0 ohms and an impedance at this frequency of 105 ohms.

What average power is delivered to the circuit by the source?

P = ? watts