NEET 2026, Physics Q17: Introduction to Alternating Currents and Circuits

NEET2026Physics

The peak value of an alternating current is 5 A and frequency is 60 Hz. How long will the current, starting from zero, take to reach the peak value ?

Solution

For $I = I_{0} sin ω t$ , the peak is first reached when $ω t = π /2$ .

$2 π f \cdot t = \frac{π}{2}$

$t = \frac{1}{4 f} = \frac{1}{4 \times 60} = \frac{1}{240}$ s.

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