For very high frequencies, the effective impedance of the circuit… | NEET 2023

Q3NEET 2023Medium

Parallel AC Circuits

For very high frequencies, the effective impedance of the circuit (shown in the figure) will be:-

Show answer and solution

Answer: (d)

At very high $\omega$ : $X_L \to \infty$ (inductors open), $X_C \to 0$ (capacitors short).
2 mH and 1 mH branches are open; 1 $\mu$ F and 2 $\mu$ F become wires, so the 3 $\Omega$ resistor carries no current.
Remaining path: $1\ \Omega$ in series with $2\ \Omega$ .
$Z = 3\ \Omega$ , so the answer is (d).

More questions on Parallel AC Circuits

A 110 V, 50 Hz, AC source is connected in the circuit (as shown in figure). The current…JEE Main 2022 (26 Jun, Shift 1)
The effective current I in the given circuit at very high frequencies will be ___________…JEE Main 2022 (26 Jul, Shift 1)
A rejector circuit is the resonant circuit in whichMHT CET 2021 (24 Sep, Shift 2)
Which graph shows the correct variation of r.m.s. current 'I' with frequency 'f' of a.c…MHT CET 2021 (24 Sep, Shift 1)
For the circuit shown below, instantaneous current through inductor ' L ' and capacitor '…MHT CET 2021 (22 Sep, Shift 2)
In the given circuit the AC source has ω = 100 rad s-1. Considering the inductor and…JEE Main 2021 (26 Aug, Shift 2)
At very high frequencies, the effective impedance of the given circuit will be…JEE Main 2021 (31 Aug, Shift 2)
In the above circuit, C = √(3)/2 μ F, R2 = 20 Ω, L = (√(3))/(10) H and R1 = 10 Ω. Current…JEE Main 2019 (12 Jan, Shift 2)