(A) 25 Hz
(B) 100 Hz
(C) 50 Hz
(D) None of these
Tag: Physics Mcq Questions and Answers
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