Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET201922 Apr 2019Morning ShiftPhysicsAlternating CurrentActual

When an inductor (L ) and a resistor (R ) in series are connected across a (12 ~V , 50 ~Hz ) supply, a current of 0.5 A flows in the circuit. The current differs in the phase from applied voltage by ( 3 ) radian. Then the value of (R ) is

Options

  1. A(10 )
  2. B(3 )
  3. C(12 )
  4. D(15 )

Correct answer

C. (12 )

Step-by-step solution

Given situation following the figure below, Given for AC circuit, (V_ rms =12 ~V , ) frequency, (f=50 ~Hz ), current, ( I=0.5 ~A ), phase difference, ( = 3 ) ( ) Impedance of the AC circuit, (Z= V_ rms I = 12 0.5 Z=24 ) Power factor, ( = R Z 3 = R 24 1 2 = R 24 R=12 )

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 AP EAMCET PYQs