(A) All diodes conduct simultaneously
(B) Two pairs of diodes conduct alternately
(C) Three diodes conduct
(D) all diodes conduct one by one
Tag: Physics Mcq Questions and Answers
The direction of the current through the load resistance of a full wave rectification circuit:
(A) Inverts the negative cycle
(B) changes for every cycle
(C) Inverts for positive cycle
(D) remains constant
The similar feature of half wave rectifier and full wave rectifier for same input A.C source is:
(A) Both produces output ripples of same frequency
(B) Both uses only forward biased mode of diode
(C) Both uses a pair of diodes for operation
(D) Both produces pulsating D.C output
For transmission of electricity to far-off places, form the A.C. power generating plant, we always use:
(A) Step-down transformer
(B) Step-up transformer
(C) Transformer with several secondaries
(D) All of these
When the plane of the coil of and A.C. generator is perpendicular to the magnetic field, the emf produced will be:
(A) Maximum
(B) Minimum
(C) Zero
(D) None of these
One henry is equal to:
(A) 1 ohm x 1 sec
(B) 1 ohm x 1 meter
(C) 1 ohm / 1 coulomb
(D) 1 ohm / 1 meter
The direction of induced current is determined by:
(A) Faraday’s law
(B) Ohm’s law
(C) Ampere’s law
(D) Lenz’s law
The SI unit of self-induction is the same as that of:
(A) Capacitance
(B) Mutual inductance
(C) e.m.f
(D) Reactance