SSC JE Electrical Engineering 24 Jan 2018 Evening Paper

Question : 150 of 200

Marks: +1, -0

A circuit having power factor of 0.8 consumes 20 W. What is the value of reactive power (in VAR) of the circuit?

Solution:

Reactive Power (VAR) =

V_I \sinϕ

=P\sinϕ

(20/8)

sinϕ
cosϕ = power factor = .8
ϕ = 36.89
sinϕ = .6
Reactive power (VAR) =

(20/8)×.6=15

VAR

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