(A) 25 Hz
(B) 100 Hz
(C) 50 Hz
(D) None of these
Category: Physics Mcqs
Physics Mcqs for NTS, PPSC, FPSC, CSS, PMS, Educators, SPSC, Lecturer, BPSC, AJKPSC, PTS, PST, EST, SST and all other exams. Users will find mcqs related to mechanics, Thermodynamics, Photonics, study of heat, Distance, work, force, time, machines, study of electricity, magnetism, law of motion, nuclear physics, Quantum, relativity, solar system, and all the topics will be covered in the physics mcqs section.
In half wave rectification, for an ideal diode, if input signal is of 10V peak, 1 KHz sinusoidal, the output would be:
(A) 5V peak, 500Hz
(B) 10V peak, 1 KHz
(C) 5V peak, 1 KHz
(D) 10V peak, 500 Hz
In a full wave rectifier, input ac current has a frequency v, the output frequency of the current is:
(A) 2v
(B) v
(C) v/2
(D) None
In a half wave rectifier, input ac current has a frequency f, the output frequency of the current is:
(A) 2f
(B) f/2
(C) f
(D) f/4
The transformer in which voltage across secondary is less than the primary voltage is called:
(A) Step down transformer
(B) step up transformer
(C) Ideal transformer
(D) none of these
Transformer change __ voltage:
(A) A.C
(B) D.C
(C) Both A and C
(D) none of these
In a step-up transformer the turn ratio is 1: 10. A resistance of 200 ohm connected across the secondary is drawing a current of 0.5 amp. What is the primary voltage and current:
(A) 50 V, 1 amp
(B) 10 V, 5 amp
(C) 25 V, 4 amp
(D) 20 V, 2 amp
The primary winding of a transformer has 500 turns and its secondary has 5000 turns. If primary is connected to ac supply of 20V and 50 Hz, then secondary will have an output of:
(A) 2 V and 5 Hz
(B) 2 V and 50 Hz
(C) 200 V and 50 Hz
(D) 200 V and 500 Hz