(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A circuit contains two elements, but it is not known if they are L, R or C. The current in this circuit when connected to a 1.20×101 V, 60.0 Hz source is 4.70 A and lags the voltage by 4.20×101 degrees.

a) What are the two elements? (Answer A,B or C)

CL

CR

LR

2. Relevant equations

Phasor diagram.

V=IZ

w = 2pi*f

tan(theta)=XL - XC / R

3. The attempt at a solution

From the phasor diagram for an AC circuit (or RLC circuit), usually the +y vector is for the inductor, the -y vector is for the capacitor, and the +x vector is for the resistor. Given that the phase angle is positive, I would say that the circuit is of type LR.

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# Homework Help: AC circuit with two components given phase angle

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