JEE Main 2022 · 27 Jun · Shift 1 · Physics Q41

← JEE Main 2022 · 27 Jun · Shift 1

PhysicsSingle correct+4 / -1Question 41 of 90

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

\dfrac1{60}

60 s

\dfrac1{120}

\dfrac1{240}

Answer and worked solution

Official answer: D

Quarter period. $T=\dfrac{2\pi}{120\pi}=\dfrac1{60}$ s, and zero to peak takes $\dfrac T4=\dfrac1{240}$ s.

(D)

Topics:AC basics and RMS values

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JEE Main 2022 · 27 Jun · Shift 1, Physics question 41