Multiple Choice Questions: Diodes

What is the primary function of a PN junction diode?

• To amplify signals

• To allow current to flow in one direction only

• To store electrical charge

• To regulate voltage

Which of the following describes the forward bias condition of a diode?

• Positive voltage is applied to the anode and negative voltage to the cathode

• Negative voltage is applied to the anode and positive voltage to the cathode

• The diode is in reverse breakdown

• The diode is short-circuited

What is the main difference between an ideal diode and a practical diode?

• An ideal diode has zero threshold voltage, while a practical diode has a threshold voltage

• A practical diode does not conduct in reverse bias, while an ideal diode does

• An ideal diode can conduct in both directions, while a practical diode can only conduct in one direction

• An ideal diode has infinite resistance, while a practical diode has finite resistance

Which of the following diodes is designed to operate in reverse bias?

• PN junction diode

• Zener diode

• Light Emitting Diode (LED)

• Schottky diode

What happens to the current in a Zener diode when the reverse voltage exceeds the Zener breakdown voltage?

• The current decreases significantly

• The current remains the same

• The current increases rapidly

• The current stops flowing

In which region does a Light Emitting Diode (LED) emit light?

• Forward bias

• Reverse bias

• Breakdown region

• Cutoff region

Which of the following is true about diodes connected in series?

• The total voltage across the diodes is the sum of the individual forward voltage drops

• The total current through the diodes is the sum of the individual currents

• Diodes in series can operate at any voltage

• The total voltage across the diodes is the average of the individual forward voltage drops

Which of the following statements about a diode in reverse bias is correct?

• The diode conducts large amounts of current

• The diode does not conduct unless in breakdown

• The diode generates light

• The diode stores charge like a capacitor

What is the forward voltage drop across a typical silicon diode?

• 0.7V

• 1.5V

• 0.3V

• 2.0V

In a PN junction diode, what are the names of the two terminals?

• Anode and Cathode

• Source and Drain

• Positive and Negative

• Gate and Source