Q. The instantaneous value of current in an A.C. circuit is $I = 2\sin{(100\ \pi\ t + \pi/3)}A$. The current will be maximum for the first time at
A) $t = \frac{1}{100}s$
B) $t = \frac{1}{200}s$
C) $t = \frac{1}{400}s$
D) $t = \frac{1}{600}s$
Explanation
(d) Current will be max at first time when
$100\pi t + \pi/3 = \pi/2 \Rightarrow 100\ \pi t = \pi/6 \Rightarrow t = 1/600\ s$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.