Solved Example: 9158-01

Shifting the phase of an AC sine wave by 90 degrees is the same thing as:

A. Moving it to the right or left by a full cycle.

B. Moving it to the right or left by 1⁄4 cycle.

C. Turning it upside-down.

D. Leaving it alone.

Correct Answer: B

Solved Example: 9158-02

Given the AC wave: \[ V = 12 \sin (16\pi t - \dfrac{\pi}{2})\] What is the phase angle of this wave?

A. 12

B. 16

C. $\dfrac{\pi}{2}$

D. $-\dfrac{\pi}{2}$

Correct Answer: D