Chapter SH, Problem 7.3APP

To determine

To calculate: Number of times the alternating current switches direction in each second.

Answer to Problem 7.3APP

The alternating current switches direction for $\underset{\_}{220}$ times per second.

Explanation of Solution

Given:

Frequency of alternating current = $110\text{ Hz}$

The current produced by an AC generator switches twice for each revolution of the coil.

Calculation:

Since frequency of the alternating current is $110\text{ Hz}$ , the coil rotates $\text{110}$ times per second. The current switches twice for each revolution. Therefore, the current switches direction for $\text{110}\times \text{2 = 220}$ times per second.

Conclusion:

The alternating current switches direction for $\underset{\_}{220}$ times per second.