Objective questions of alternating current

Objective questions of alternating current

LC-OSCILLATOR

This assignment (Objective questions of alternating current),provide the important objective questions of the chapter alternating current ,which is important for the students preparing for class-12th board examination or , other competitive examinations (JEE/NEET)

Before to solve this assignment (Objective questions of alternating current), student should solve the assignment of objective questions of electromagnetic induction-

  1. A direct current of 5 amp is superimposed on an alternating current I = 10sin ɷt flowing through a wire. The effective value of the resulting current will be:
  • (a)(15/2) amp     (b) 5√3 amp  (c) 5√5 amp      (d) 15 amp
  1. In an AC circuit, a resistance of R ohm is connected in series with an inductance L. If phase angle between voltage and current is 45°, the value of inductive reactance will be:
  • (a)R/4
  • (b)R/2
  • (c)R
  • (d)cannot be found with the given data
  1. Resonance frequency of L – C circuit is:
  • (a)1/2π √LC       (b) 1/2πLC   (c) 1/2π √L/C   (d) 1/2π √LC
  1. In L-C-R series AC circuit, the phase angle between current and voltage is:
  • (a)any angle between 0 and ± π/2
  • (b)π/2
  • (c)π
  • (d)any angle between 0 and π
  1. In an L-C-R circuit, the capacitance is made one-fourth, when in resonance, so that the circuit remains in resonance?
  • (a)4 times    (b) (1/4) times       (c) 8 times        (d) 2 times

TO download complete assignment of Objective questions of alternating Current- click here-

321 thoughts on “Objective questions of alternating current

Leave a Reply

Your email address will not be published. Required fields are marked *