Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK2023PhysicsAlternating Current

In an electrical circuit R, L, C and A C voltage source are all connected in series. When L is removed from the circuit, the phase difference between the voltage and the current in the circuit is / 3 . If instead C is removed from the circuit, the phase difference is again / 3 . The power factor of the circuit is

Options

  1. A1 / 2
  2. B1 2
  3. C1
  4. D3 2

Correct answer

C. 1

Step-by-step solution

Here, phase difference = X_L-X_C R 3 = X_L-X_C R When L is removed, 3 = X_C R = 3 Similarly, when C is removed aligned 3 & = X_L R = 3 X_L & = 3 R aligned array lc Now, & =0 & =0^ array Power factor, = 0^ =1

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