An *RLC* circuit consists of a 180 resistor, a 21.0 µF capacitor, and a 400 mH inductor, connected in series with a 120 V, 60.0 Hz power supply.

(b)Which reaches its maximum earlier, the current or the voltage?

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+2 votes

An *RLC* circuit consists of a 180 resistor, a 21.0 µF capacitor, and a 400 mH inductor, connected in series with a 120 V, 60.0 Hz power supply.

(a)What is the phase angle between the current and the applied voltage?

°

(b)Which reaches its maximum earlier, the current or the voltage?
current voltage

(b)Which reaches its maximum earlier, the current or the voltage?

0 votes

The phase angle is the angle between the current and voltage.

This is found by using the following formula:

**Phase angle = inverse tangent( (XL - XC )/ R)** (*where XL = inductive reactance, XC = capacitive reactance)

So first we need to find **XL **and **XC** :

**XL = ω*L** (*where ω = angular frequency, L = inductance)

**XC = 1 / ****ω*C** (*where ω = angular frequency, C = capacitance)

and ω is equal to:

**ω = 2*pi*f** (*where f = frequency in Hz)

After finding **XL **and **XC**, plug back into first equation fo find teh phase angle

Part B:

If **XL > XC** then **Voltage **leads, if** XL < XC** then **Current **leads, if they're equal then the phase angle is 0.

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