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At alternating voltage is applied across...

At alternating voltage is applied across the R-L combination V =220 sin 120t V and the current I = 4sin (120t - `60^@`)A developes. The power consumption is ……

A

0

B

110 W

C

220 W

D

440 W

Text Solution

Verified by Experts

The correct Answer is:
C
`V_m=220V, I_m=4A, delta=60^@`
`P=(V_mI_m)/2 cos delta`
`=(220xx4)/2 cos 60^@ =(220xx4)/2 xx 1/2` = 220 W
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KUMAR PRAKASHAN-ALTERNATING CURRENTS -SECTION-D MCQs (DARPAN BASED ON TEXTBOOK)
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