Q.1.

One of the advantages of using transformer coupling in a half-wave rectifier is that it allows the ac source to be directly connected to the load.

Q.2.

A zener diode can be used to provide voltage regulation in a power supply.

Q.3.

The conduction band is closest to the valence band in

Q.4.

What is the current through the zener diode?

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Q.5.

The voltage where current may start to flow in a reverse-biased pn junction is called the

Q.6.

The conduction band is closest to the valence band in

Q.7.

What is the current through the zener diode?

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Q.8.

The diode's characteristic curve shows that current increases when voltage increases.

Q.9.

The positive lead of a diode is the cathode.

Q.10.

If a bridge rectifier is used, it is not necessary to use a transformer.

Q.11.

It is not possible to use a half-wave rectifier circuit without a transformer.

Q.12.

Electrons in the conduction band are the only ones that are included in the electron current flow.

Q.13.

The dc current through each diode in a bridge rectifier equals:

Q.14.

Doping semiconductive material is the process of putting a small amount of pentavalent or trivalent atoms in with tetravalent atoms.

Q.15.

The forward biased characteristics of a zener diode are the same as those of a diode.

Q.16.

Breakdown voltage and peak inverse voltage are the same.

Q.17.

Special diodes designed to conduct in the reverse direction are called _______________ diodes.

Q.18.

A common problem with rectifiers is open diodes.

Q.19.

The small amount of ac signal present on the output of a filtering network for a dc power supply is known as ________.

Q.20.

___ occurs when a pn junction is first formed.