Understanding Diodes

This video tutorial explains the concept of diodes, their structure, and how they function in electrical circuits. It covers the flow of conventional current and electron flow, the structure of diodes with p-type and n-type materials, and the conditions under which diodes conduct electricity. The video also includes a practical circuit analysis problem, demonstrating how to calculate current and power in a circuit with a diode and resistor. Finally, it discusses different scenarios to determine if a diode is conducting.

What is the primary function of a diode?

• To allow current to flow in both directions

• To allow current to flow in one direction

• To convert AC to DC

• To store electrical energy

In a diode, what is the material of the anode?

• N-type semiconductor

• P-type semiconductor

• Metal

• Insulator

What happens to a diode in reverse bias mode?

• It blocks current flow

• It stores energy

• It converts energy

• It conducts electricity

What is the knee voltage for a silicon diode?

• 1.0 volts

• 0.7 volts

• 0.5 volts

• 0.3 volts

What is the breakdown voltage in a diode?

• The voltage at which a diode starts conducting in reverse bias

• The voltage at which a diode stops conducting

• The voltage at which a diode conducts in forward bias

• The voltage at which a diode stores energy

In a circuit with a 12V battery and a 50 ohm resistor, what is the current if the diode voltage drop is 0.7V?

• 0.226 amps

• 0.5 amps

• 1 amp

• 0.1 amps

How much power is consumed by a diode with a voltage drop of 0.7V and a current of 0.226A?

• 0.158 watts

• 0.05 watts

• 0.5 watts

• 1 watt

What is the power consumed by a 50 ohm resistor with a voltage of 11.3V across it?

• 0.5 watts

• 1 watt

• 2.554 watts

• 5 watts

In a circuit, if the conventional current flows in the direction of the diode's arrow, what does it indicate?

• The diode is off

• The diode is storing energy

• The diode is on

• The diode is converting energy

If a diode is connected with a positive 6V on one side and ground on the other, is the diode on or off?

• On

• Converting energy

• Storing energy

• Off