Electro Magnetic Induction And Alternating Currents Question 108
Question: An ac source is rated at 220V, 50 Hz. The time taken for voltage to change from its peak value to zero is [Orissa JEE 2003]
Options:
A) 50 sec
B) 0.02 sec
C) 5 sec
D) $ 5\times {{10}^{-3}} $ sec
Show Answer
Answer:
Correct Answer: D
Solution:
Required time $ t=T/4=\frac{1}{4\times 50}=5\times {{10}^{-3}}sec $
