NEET Class neet Answered

Capacitive impedence of capacitor of capacitance C is 1/( C ω ) , where ω is angular frequency of alternating voltage .

if capacitance C is in μF and angular frequency ω = 10⁹ rad/s , then we get capacitive impedence as milliohms .

Hence at high frequency capacitor acts as short circuit component of circuit.

Inductive impedence of inductor of inductance is Lω .

if inductance is in mH and angular frequency ω = 10⁹ rad/s , then we get inductive impedence as megohms .

Hence at high frequency inductor acts as open circuit componet of circuit.

Hence, as shown in figure , we get 3 Ω as the effective resistance in the give circuit due to high frequency alternating voltage.