Understanding Diodes

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

• To amplify electrical signals

• To allow current to flow in only one direction

• To store electrical energy

• To allow current to flow in both directions

Which end of a diode is known as the anode?

• The end connected to the negative terminal

• The end connected to the positive terminal

• The end without the stripe

• The end with the stripe

In electron flow, electrons move from:

• Cathode to anode

• Anode to cathode

• Negative to positive

• Positive to negative

What is the term used when a diode allows current to flow?

• Electron flow

• Reverse bias

• Forward bias

• Conventional flow

What material is commonly used as a semiconductor in diodes?

• Copper

• Rubber

• Silicon

• Aluminium

What happens to electrons in a conductor like copper?

• They are only present in the nucleus

• They are tightly held and cannot move

• They can easily move between atoms

• They are completely free from the atoms

What is created at the junction of p-type and n-type materials in a diode?

• A conduction band

• A covalent bond

• A valence shell

• A depletion region

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

• 1.5 volts

• 1.0 volts

• 0.7 volts

• 0.5 volts

In forward bias, which terminal is connected to the positive voltage source?

• Both terminals

• Cathode

• Anode

• Neither terminal

What happens to a diode in reverse bias?

• It acts as a conductor

• It allows current to flow

• It acts as an insulator

• It amplifies the current