Q.

In an ac circuit the potential difference V and current I are given respectively by   V = 100 sin (100 t) volt and  I=100 sin100t +π3 mA.The power dissipated in the circuit will be

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a

104 W

b

10 W

c

2.5 W

d

5 W

answer is C.

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Detailed Solution

power consumption Pav= ErmsIrmscosϕ=10021002x10-3cos 600=2.5 W
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In an ac circuit the potential difference V and current I are given respectively by   V = 100 sin (100 t) volt and  I=100 sin100t +π3 mA.The power dissipated in the circuit will be