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Electric circuits miscellaneous

  1. In the circuit shown in the figure, if the power consumed by the 5 ohm resistor is 10 W, then the power factor of the circuit is _______
    1. 1.06
    2. 0.6
    3. 0.06
    4. 1.6
Correct Option: B

Power consumed by 5 ohm resistor = 10 W

∴ Current, I =
P
R

=
10
= √2 A
5

Power consumed by the 10 ohm resistor = 2 × 10 = 20 W
Total power consumed = 30 W
Circuit volt ampere =
50
× √2 = 50 W
2

∴ Power factor =
30
= 0.6 (lagging)
50



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