Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202616 April 2026Morning ShiftPhysicsAlternating CurrentActual

A step down transformer has turns ratio 20:1. If 8V are applied across 0.4 secondary then the primary current will be

Options

  1. A0.5 A
  2. B1 A
  3. C2 A
  4. D4 A

Correct answer

B. 1 A

Step-by-step solution

Given turns ratio N_p N_s = 20 Secondary voltage V_s = 8 V Secondary resistance R_s = 0.4 Secondary current I_s = V_s R_s = 8 0.4 = 20 A For an ideal transformer, I_p I_s = N_s N_p I_p = I_s N_s N_p = 20 1 20 = 1 A Answer: 1 A

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