Semiconductor Physics Quiz

What is the main characteristic of a p-n junction?

• Allows current flow in both directions

• Allows current flow in only one direction

• Prevents current flow completely

• Generates heat when current flows

What is the space-charge region also known as?

• Saturation region

• Amplification region

• Depletion region

• Conduction region

What type of current is generated due to the movement of carriers in an electric field?

• Resistance current

• Diffusion current

• Conduction current

• Drift current

What happens when a p-type and n-type semiconductor are brought into contact?

• They form a p-n junction

• They repel each other

• They create a short circuit

• They explode

What is the built-in potential barrier for a Silicon P-N junction with N_a = 2 x 10^17 cm^-3 and N_d = 10^15 cm^-3 at 300K?

• 0.635V

• 1.139V

• 0.713V

• 1.204V

What is the space-charge width for a Silicon P-N junction with N_a = 10^16 cm^-3 and N_d = 10^15 cm^-3 at 300K?

• 1.139 cm

• 1.204 cm

• 0.713 cm

• 0.635 cm

What happens to the depletion region in a p-n junction under reverse bias?

• It narrows

• It widens

• It remains the same

• It disappears

What type of current is induced in a p-n junction under reverse bias?

• Conduction current

• Leakage current

• Drift current

• Diffusion current

What is the operating condition when no external voltage is applied to a p-n junction?

• Forward bias

• Reverse bias

• No bias

• Saturation bias

What is the main purpose of a p-n junction diode?

• To generate heat

• To store data

• To amplify signals

• To control current flow