Average Power MCQ’s

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This set of Network Theory Multiple Choice Questions & Answers (MCQs) focuses on “Average Power”.

1. Average power (Pavg)=?
a) VeffImcosθ
b) VeffIeffcosθ
c) VmImcosθ
d) VmIeffcosθ

2. In case of purely resistive circuit, the average power is?
a) VmIm
b) VmIm/2
c) VmIm/4
d) VmIm/8

3. The equation of the average power (Pavg) is?
a) (VmIm/2)cosθ
b) (VmIm/2)sinθ
c) VmImcosθ
d) VmImsinθ

4. In case of purely capacitive circuit, average power = ____ and θ = _____
a) 0, 0⁰
b) 1, 0⁰
c) 1, 90⁰
d) 0, 90⁰

5. If a circuit has complex impedance, the average power is ______
a) power stored in inductor only
b) power stored in capacitor only
c) power dissipated in resistor only
d) power stored in inductor and power dissipated in resistor

6. A voltage v (t) = 100sinωt is applied to a circuit. The current flowing through the circuit is i(t) = 15sin(ωt-30⁰). Find the effective value of current.
a) 9
b) 10
c) 11
d) 12

7. In case of purely inductive circuit, average power = ____ and θ = ______
a) 0, 90⁰
b) 1, 90⁰
c) 1, 0⁰
d) 0, 0⁰

8. A voltage v (t) = 100sinωt is applied to a circuit. The current flowing through the circuit is i(t) = 15sin(ωt-30⁰). Find the effective value of voltage.
a) 70
b) 71
c) 72
d) 73

9. A voltage v (t) = 100sinωt is applied to a circuit. The current flowing through the circuit is i(t) = 15sin(ωt-30⁰). Determine the average power delivered to the circuit.
a) 620
b) 630
c) 640
d) 650

10. Determine the average power delivered to the circuit consisting of an impedance Z = 5+j8 when the current flowing through the circuit is I = 5∠30⁰.
a) 61.5
b) 62.5
c) 63.5
d) 64.5

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