NEET Alternating Current MCQs & PYQs

In a purely inductive AC circuit, which of the following sketches represent the variation of the current amplitude I0 with the frequency ω ?

The phase difference between applied voltage and current in RLC series is :

Consider following in AC circuits and their characteristics :

A fully charged capacitor C, with initial charge q0, is connected to a coil of self inductance L at t = 0. The time at which the energy is stored equally between the electric and magnetic field is:

The graph shows variation of I with f for a series R-L-C network. Keeping L and C constant. If R
decreases :

(a) Maximum current (Im) increases
(b) Sharpness of the graph increases
(c) Quality factor increases
(d) Band width increases

In an a.c. circuit V and I are given by
V = 100 sin (100 t) volts
I = 100 sin (100t + π/3) mA
The power dissipated in the circuit is

A condenser of capacity C is charged to a potential difference of V1. The plates of the condenser are then connected to an ideal inductor of inductance L.  The current through the indictors when the potential difference across the condenser reduces to V2 is ?

The readings of ammeter and voltmeter in the following circuit are respectively :-

Which one of the following curves represents the variation of impedence (Z) with frequency f in series LCR circuit :-

For given circuit, find effective impedance for frequencies much higher than resonating
frequency.