In an AC circuit, V and I are given by V = 50sin50t and I = The power dissipated in the circuit.

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1.25

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500

answer is B.

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Detailed Solution

Concept: In an AC circuit, the instantaneous values of voltage, current, and thus power are constantly changing as a result of the magnetic and/or electric fields created by the components. Unlike a purely resistive component, this power is stored and then returned to the supply as the sinusoidal waveform goes through one complete periodic cycle.

Vrms

Irms

Hөre, Vrms

Irms

and

Thus,

Hence, option 2 is correct.

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