Which statement is true for an ac circuit? - Networks Analysis and Synthesis

Electronics and Communication Engineering (ECE) : Networks Analysis and Synthesis - Quiz(MCQ)

Which statement is true for an ac circuit?

Active power is always less than apparent power

Active power is always more than reactive power

Active power cannot be more than apparent power

Active power cannot be more than reactive power

Correct Answer : Option (C) : Active power cannot be more than apparent power

Explanation : Active and apparent power are equal for resistive circuit. Otherwise active power is less than apparent power.

Recently Updated in Networks Analysis and Synthesis Questions

Ohm's law is valid for

dc voltage and current

ac voltage and current

dc and ac voltages and currents

all voltages and current

Correct Answer : all voltages and current

Explanation : KCL and KVL are valid for voltages and currents of all wave shapes during transient as well as steady state conductions.

If e = 110 sin (ωt + p/3) and i = 5 sin (ωt - p/3), the impedance of the circuit is

11 Ω

16 Ω

22 Ω

30.8 Ω

Correct Answer : 22 Ω

Explaination :

Two phasors having rms values V₁ and V₂ which are added to give a phasor having rms value V₃. V₃ is maximum if phase angle between V₁ and V₂ is

90°

180°

270°

360°

Correct Answer :

360°

Explaination : Sum of phasors is maximum if they are in phase and 360° = 0.