(A) half wave amplification
(B) full wave rectification
(C) half wave rectification
(D) full wave amplification
Author:
In a HWR if input Alternating voltage is 250sin 100 t , the frequency of output will be:
(A) 25 Hz
(B) 100 Hz
(C) 50 Hz
(D) None of these
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