M4- Electronics Fundamentals

What are the most important elements used for semiconductors?

• Copper and Aluminum

• Silicon and Germanium

• Iron and Nickel

• Gold and Silver

What is the purpose of a semiconductor diode?

• To amplify electrical signals

• To allow current to flow in only one direction

• To store electrical energy

• To convert AC to DC

What is the threshold voltage for a silicon diode?

• 0.3 volts

• 0.7 volts

• 1.2 volts

• 2.0 volts

What happens to the resistance of a silicon diode in the forward-biased condition above the threshold voltage?

• It becomes very high

• It becomes very low

• It remains unchanged

• It fluctuates

Which type of diode is primarily used in communication technology?

• Rectifier diodes

• High power diodes

• Microdiodes

• Zener diodes

What should a serviceable diode show on a multimeter when tested in the forward bias direction?

• High resistance

• Low resistance

• Around 0.7 volts

• Zero volts

Why might diodes be connected in series?

• To increase the forward current

• To increase the reverse voltage capacity

• To decrease the forward voltage

• To decrease the reverse current

What is the purpose of a free-wheeling diode?

• To amplify signals

• To short-circuit back-emf

• To store energy

• To convert DC to AC

What is the main application of diodes in rectifiers?

• To amplify signals

• To transform AC to DC

• To store energy

• To regulate voltage

How many diodes are required for a full-wave rectifier using a bridge circuit?

• Two

• Four

• Six

• Eight