Diode and Rectifier Worksheet

A diode for which you can change the reverse bias, and thus vary the capacitance is called a

• varactor diode

• tunnel diode

• zener diode

• switching diode

A filtered full-wave rectifier voltage has a smaller ripple than does a half-wave rectifier voltage for the same load resistance and capacitor values because:

• there is a shorter time between peaks

• there is a longer time between peaks

• the larger the ripple, the better the filtering action

• none of the above

Testing a good diode with an ohmmeter should indicate

• high resistance when forward or reverse biased

• low resistance when forward or reverse biased

• high resistance when reverse biased and low resistance when forward biased

• high resistance when forward biased and low resistance when reverse biased

The peak inverse voltage (PIV) across a nonconducting diode in a bridge rectifier equals approximately:

• half the peak secondary voltage

• twice the peak secondary voltage

• the peak value of the secondary voltage

• four times the peak value of the secondary voltage

Electrons in the outermost orbit or shell of an atom are called

• free electrons

• negative ions

• valence electrons

• conduction band electrons

Shunting the AC component away from the load is the task of a:

• transformer

• filter

• regulator

• rectifier

A pn junction allows current flow when

• the p-type material is more positive than the n-type material

• the n-type material is more positive than the p-type material

• both the n-type and p-type materials have the same potential

• there is no potential on the n-type or p-type materials

When a diode is forward biased, the voltage across it

• is directly proportional to the current

• is inversely proportional to the current

• is directly proportional to the source voltage

• remains approximately the same

Why is heat produced in a diode?

• due to current passing through the diode

• due to voltage across the diode

• due to the power rating of the diode

• due to the PN junction of the diode

The arrow in the schematic symbol of a diode points to

• the n-type material, which is called the anode

• the n-type material, which is called the cathode

• the p-type material, which is called the anode

• the p-type material, which is called the cathode