Given below are two statements: Statement I: An AC circuit undergoes electrical resonance if it contains either a capacitor or an inductor. Statement II: An AC circuit containing a pure capacitor or a pure inductor consumes high power due to its non-zero power factor. Choose the correct answer.
Options

Question

Given below are two statements: Statement I: An AC circuit undergoes electrical resonance if it contains either a capacitor or an inductor. Statement II: An AC circuit containing a pure capacitor or a pure inductor consumes high power due to its non-zero power factor. Choose the correct answer.

Options

G1 Physics · Accepted Answer

Electrical resonance in a series AC circuit requires both inductive and capacitive reactances so that Xₗ = X꜀ A circuit containing only a pure inductor or only a pure capacitor has phase difference 90° between voltage and current. Therefore, power factor = cos90° = 0 and average power consumed is zero. Hence both statements are false. Therefore option C follows.