A resistance R draws power P when connected to an AC source. If an inductance is now placed in series with the resistance, such that the impedance of the circuit becomes Z , the power drawn will be:

Question

A resistance R draws power P when connected to an AC source. If an inductance is now placed in series with the resistance, such that the impedance of the circuit becomes Z , the power drawn will be:, P R Z 2, P R Z, P R Z, P

MARKS App · Accepted Answer

We know P = V 2 R ; P ′ = V . V z cos ⁡ Φ V 2 = P R & cos ⁡ Φ = R z P ′ = V 2 z R z ⇒ P R z 2 R = P R 2 z 2 = P R z 2

Search any question & find its solution

Looking for more such questions to practice?