Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK2023Morning ShiftPhysicsAlternating CurrentActual

In the series L-C-R circuit shown, the impedance is

Options

  1. A300
  2. B500
  3. C200
  4. D100

Correct answer

B. 500

Step-by-step solution

Given parameters for the series L-C-R circuit are: Inductance L = 1 H Capacitance C = 20 F = 20 10⁻⁶ F Resistance R = 300 Frequency f = 50 Hz The angular frequency is given by: = 2 f = 2 50 = 100 rad/s Calculate inductive reactance X_L : X_L = L = 100 1 = 100 Calculate capacitive reactance X_C : X_C = 1 C = 1 100 20 10⁻⁶ = 1 2000 10⁻⁶ = 1 2 10⁻³ = 500 The impedance Z of a series L-C-R circuit is given by: Z = R^2 + (X_L - X_C)^2 Substituting the values: Z = 300^2 + (100 - 500)^2 Z = 300^2 + (-400)^2 Z = 90000 + 160

Practice Alternating Current on Quantrex Academy →

More from Alternating Current

An electronic device operates at 2 MHz. The oscillating circuit has an inductance 20 10⁻⁵ H. What is the capacitive reactance of the resonant circuit? 2026When a current of 2.5 A passes through the primary coil of a transformer of 200 number turns, the magnetic flux linked with the secondary coil having 400 turns is 600 10⁻⁶ T m^2 . 2026In a given circuit, the instantaneous values of the alternating voltage and current are V = 0.5 (80 t + 3 ) volt and I = 0.5 (80 t) ampere respectively. Find the average power cons 2026A source of alternating emf = ₀ ( t) is connected to a capacitor. Then the instantaneous current in the circuit is: 2026If wattless current flows in an AC circuit, then the circuit is: 2026A solenoid having resistance R = 60 and inductance L = 0.4 H is connected to an AC source V = 100 2 200t . Find the maximum current. 2026In a circuit containing a pure resistor connected to an AC source, 2026A light bulb rated 100 W is connected to an AC source of 220 V, 50 Hz. The rms current through the bulb is 2026 Full Alternating Current list All COMEDK PYQs