Why are donor energy levels in n-type semiconductors situated just below the conduction band?

Two statements are given below: Statement A: When the forward bias voltage across a p-n junction diode increases above a certain threshold voltage, the diode current increases significantly. Statement B: This current is called reverse saturation current. Choose the correct answer:

When an electric field is applied across a semiconductor, which of the following statements is correct?

Which band in a solid contains electrons that are most likely to participate in electrical conduction?

The built-in barrier potential formed across a p-n junction diode is a function of:

Upon applying a reverse bias to a p-n junction, the width of the depletion region:

Identify the correct condition for the operation of a bipolar junction transistor in the active region.

What is the RMS (IRMS) value of current for a half-wave rectifier?

Identify the correct statement with respect to temperature dependencies of V-I characteristics of a diode.