Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202522 Apr 2025Evening ShiftPhysicsAlternating CurrentActual

A coil has inductance 2 H . The ratio of its reactance when it is connected first to an a.c. source and then to a d.c. source is

Options

  1. A-1
  2. Bzero
  3. C+1

Correct answer

C. +1

Step-by-step solution

The inductive reactance is defined as X_L = L , where = 2 f is the angular frequency. For an AC source ( f_ AC 0 ), the reactance is finite: X_L = 2 f_ AC L . For DC sources, the frequency is zero ( f_ DC = 0 ), yielding X_L = 2 0 L = 0 . The ratio of reactances is therefore: X_ L_ AC X_ L_ DC = 2 f_ AC L 0 = As this diverges, the answer is C .

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 MHT CET PYQs