Question

If the frequency of ac is 60 Hz the time difference corresponding to a phase difference of 60^o is

• A. 60 sec
• B. 1sec
• C. $\frac{1}{60}\sec$
• D. $\frac{1}{360}\sec$

Answer 1

Answer: (D)

$\frac{1}{360}\sec$

Answer 2

Time difference T.D. $= \frac{T}{2\pi} \times \varphi$ ⇒ T.D.

$= \frac{T}{2\pi} \times \frac{\pi}{3} = \frac{T}{6} = \frac{1}{6\nu} = \frac{1}{6 \times 60} = \frac{1}{360}\sec$