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JEE Main 2022 (27 Jun, Shift 1) · AC Basics: Peak, RMS & Average Values

AC Basics: Peak, RMS & Average Values question from JEE Main 2022 (27 Jun, Shift 1)

Q22JEE Main 2022 · 27 JUN · SHIFT 1Easy

AC Basics: Peak, RMS & Average Values

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?

Show answer and solution

Answer: (d)

$\omega = 120\pi \Rightarrow f = 60$ Hz.
Zero to peak is a quarter cycle: $t = \frac{1}{4f} = \frac{1}{240}$ s
So the answer is (d) $\frac{1}{240}$ s.

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