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  4. The current flowing through an ac circuit is given by I=5 sin (120 π t) A How long will the current take to reach the peak value starting from zero?

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Q. The current flowing through an ac circuit is given by
$I=5 \sin (120 \pi t) A$
How long will the current take to reach the peak value starting from zero?

JEE MainJEE Main 2022Alternating Current

Solution:

$\omega=120 \pi=\frac{2 \pi}{T} \Rightarrow T=\frac{1}{60} sec$
time taken to reach peak value $=\frac{T}{4}=\frac{1}{240} S$