The figure shows variation of current (I) with time (t) in four devices P, Q, R and S. The device in which an alternating current flows is :

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MCQ (Single)Alternating Current and Its CharacteristicsCBSE PYQ

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An alternating current I = 14 sin (100 πt) A passes through a series combination of a resistor of 30 Ω and an inductor of (2/5π) H. Taking √2 = 1.4, calculate the (i) rms value of the voltage drops across the resistor and the inductor, and (ii) power factor of the circuit.

CASE_STUDIESAlternating Current and Its CharacteristicsInductive Reactance in AC CircuitPower Factor in AC Circuit