Understanding Diodes

This video tutorial by Paul from Engineering Mindset explains the basics of diodes, their structure, and functionality. It covers how diodes control current flow in circuits, the atomic structure affecting conductivity, and the doping process to form PN junctions. The video also discusses diode applications, such as converting AC to DC and circuit protection, and demonstrates how to test diodes using a multimeter.

What is the primary function of a diode in a circuit?

• To allow current to flow in both directions

• To amplify signals

• To allow current to flow in only one direction

• To store electrical energy

Which end of the diode is connected to the negative terminal in forward bias?

• The anode

• The cathode

• The middle terminal

• Both terminals

What is the term used when a diode prevents current from flowing?

• Forward bias

• Reverse bias

• Positive bias

• Neutral bias

What material is commonly used as a semiconductor in diodes?

• Copper

• Silicon

• Rubber

• Aluminium

What is the potential difference across the depletion region in typical diodes?

• 0.5 volts

• 0.7 volts

• 1.5 volts

• 1.0 volts

What happens to the diode when the voltage difference exceeds its maximum limit?

• It becomes a conductor

• It becomes an insulator

• It amplifies the current

• It stores energy

How can diodes be used to convert AC to DC?

• By allowing only the positive half of the AC cycle to pass

• By blocking both halves of the AC cycle

• By allowing only the negative half of the AC cycle to pass

• By allowing both halves of the AC cycle to pass

What is the purpose of adding capacitors in a rectifier circuit?

• To amplify the signal

• To decrease the current

• To smooth out the ripple

• To increase the voltage

What reading should you get on a multimeter when testing a diode in reverse bias?

• 0.5 volts

• 0.7 volts

• 1.0 volts

• OL (outside limits)

What does a voltage drop reading of 0.71 volts indicate when testing a diode?

• The diode is a conductor

• The diode is functioning correctly

• The diode is faulty

• The diode is an insulator