Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK2024PhysicsAlternating CurrentActual

A group of devices having a total power rating of 500 watt is supplied by an AC voltage E = 200 (3.14t + 4 ) . Assuming the current in the circuit is of the form I = I₀ (3.14t) , the r.m.s. value of the circuit current is

Options

  1. A500 A
  2. B200 A
  3. C1 A
  4. D5 A

Correct answer

D. 5 A

Step-by-step solution

E₀ = 200 V, so E_ rms = 200 2 V Phase difference between voltage and current = 4 Power factor = 4 = 1 2 P = E_ rms I_ rms 500 = 200 2 I_ rms 1 2 = 200 2 I_ rms = 100 I_ rms I_ rms = 500 100 = 5 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 COMEDK PYQs