27.

28.

b)The load resistance of a centre tapped FWR 15 5009 and the necessary voltage (end to end) is
60 sin(100at). Calculate (1) peak, average and rms values of current, (ii) ripple factor and (111)
efficiency of the rectifier, Each diode has an idealised ۰۱۷ characteristics having slope
corresponding to a resistance of 500. (6 marks)

a) Draw the output waveform and transfer
characteristics of the given clipper circuit:

(5 marks)
b) With neat block diagram, explain the
working of DSO, (5 marks)

a)With the aid of a block diagram, explain
the working of a CRO.Also give the
constructional details of cathode ray tube.
(7 marks)

b)A sinusoidal waveform is displayed on CRO screen with one full cycle in two divisions. If the

time-base knob is in 0.5 ms position, what is the frequency of the waveform?
(3 Marks)