TUTORIAL SHEET-3

Que1:- A full wave rectifier circuit is required to give a DC output voltage of 80V. Neglect the resistance of diode . Find

1)DC load current if RL is 5000 ohm.

2)Efficiency of rectifier.

3)Peak current through Diode

Que2:- Draw the cuircuit connected in black box to obtain the shown output waveform for given sinusoidal input.

Que3:-The input voltage to the two level clipper circuit shown below varies linearly from 0 to 150V. Show the output voltage to the same time scale as the input voltage. Assume ideal diode.

Que4:-A Bridge rectifier has an output DC current of 20mA and a filter capacitance of 470µF. Find the peak to peak ripple voltage if the ripple frequency is 100Hz.

Que5:-Calculate the dynamic resistance of an ideal diode at 170C, when a current of 1 mA flows through the diode .

Que 6- An ideal Germanium (Ge) PN junction diode has at a temperature of 1250C, a reverse saturation current of 30 µA. At a temperature of 1250C . Find the dynamic resistance of diode for 0.2 volt biased in-

a) The forward directionb) The reverse direction

Que 7 -A full bridge rectifier is shown fig. Calculate -

a) The DC output voltage

b) Peak inverse voltage

Que 8 -A Half Wave rectifier is shown in fig calculate-

a) The DC output voltage .

b) Peak inverse voltage.