15.2 Simple AC Circuits

Phasor diagrams for one element at a time, and the reactance of a resistor, capacitor, or inductor that decides whether current lags or leads voltage.

University Physics Volume 2, 15.2 Simple AC Circuits

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6 exercises

15.2 Exercise 1

Repeat the example for an ac source of amplitude 20 V and frequency 100 Hz.

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15.2 Exercise 3

Calculate the reactance of a $5.0 - \mu \text{F}$ capacitor at (a) 60 Hz, (b) 600 Hz, and (c) 6000 Hz.

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15.2 Exercise 5

Calculate the reactance of a 5.0-mH inductor at (a) 60 Hz, (b) 600 Hz, and (c) 6000 Hz.

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15.2 Exercise 7

At what frequency is the reactance of a $20 - \mu \text{F}$ capacitor equal to that of a 10-mH inductor?

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15.2 Exercise 9

A $50 - \Omega$ resistor is connected across the emf $v \left(t\right) = \left(160 \text{V}\right) \text{sin} \left(120 \pi t\right)$ . Write an expression for the current through the resistor.

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15.2 Exercise 11

A 100-mH inductor is connected across the emf of the preceding problem. (a) What is the reactance of the inductor? (b) Write an expression for the current through the inductor.

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