Q.1.
The ratio of reverse resistance and forward resistance of a germanium crystal diode is about ___________
Q.2.
The most widely used rectifier is ___________
Q.3.
A zener diode has ___________
Q.4.
If the a.c. input to a half-wave rectifier is an r.m.s value of 400/√2 volts, then diode PIV rating is ___________
Q.5.
When a crystal diode is used as a rectifier, the most important consideration is ___________
Q.6.
For the same secondary voltage, the output voltage from a centre-tap rectifier is ___________ than that of bridge rectifier
Q.7.
The disadvantage of a half-wave rectifier is that the___________
Q.8.
A zener diode has ___________ breakdown voltage
Q.9.
A zener diode is always ___________ connected.
Q.10.
A crystal diode is a ___________ device
Q.11.
The PIV rating of a crystal diode is ___________ that of equivalent vacuum diode
Q.12.
The PIV rating of each diode in a bridge rectifier is ___________ that of the equivalent centre-tap rectifier
Q.13.
When the graph between current through and voltage across a device is a straight line, the device is referred to as ___________
Q.14.
A crystal diode is used as ___________
Q.15.
A zener diode is used as ___________
Q.16.
A half-wave rectifier has an input voltage of 240 V r.m.s. If the step-down transformer has a turns ratio of 8:1, what is the peak load voltage? Ignore diode drop.
Q.17.
A crystal diode has
Q.18.
A 10 V power supply would use ___________ as filter capacitor.
Q.19.
The knee voltage of a crystal diode is approximately equal to ___________