Question

What is the true power consumed in a 30V series RLC circuit if Z= 20 ohm and R= 10 ohm?

Answer 1

Answer:

Correct option is

B

400 W

Given : V

rms

=220 V R=18Ω Z=33Ω

True power consumed P=

2

1

Z

V

rms

2

cosϕ

where cosϕ=

Z

R

⟹ P=

2Z

2

V

rms

2

R

∴ P=

2×33

2

220×220×18

We get P=400W

Video Explanation