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JEE Main 2022 Physics question

PhysicsAlternating CurrentJEE Main 2022

A resistance of 40 is connected to a source of alternating current rated 220 V, 50 Hz. Find the time taken by the current to change from its maximum value to the rms value is

Answer: (1)

Solution

Take , so it is maximum at t = 0. The rms value is

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Question ID VK-024080