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Power Factor

In an ac circ...

Question

In an ac circuit, the current is given by $i = 5 s i n (100 t - \frac{π}{2})$ and the ac potential is $V = 200 s i n (100) v o l t .$ Then the power consumption is

20 watts

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40 watts

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1000 watts

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0 watt

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Solution

The correct option is D 0 watt
$P = V i c o s ϕ$
Phase difference $ϕ = \frac{π}{2} \Rightarrow$ zero

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Similar questions

A C

i = 5 sin (100 t - \frac{π}{2})

V = 200 sin (100 t)

V

A C

V = 200 sin 100 t

I = 5 sin (100 t - \frac{π}{2})

i = 5 s i n (100 t - \frac{π}{2})

V = 200 s i n (100) v o l t .

AC

V

i

V = 200 sin 100 t Volt

i = 100 sin (100 t + \frac{π}{3}) mA

W .

I = 5 sin (100 t - π / 2)

V = 200 sin (100 t)

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