Diode Operation and Equivalent Models Quiz

What is the function of a diode?

• Allows current to flow easily in one direction

• Allows current to flow easily in both directions

• Presents high resistance in both directions

• Presents high resistance in one direction

What is the region at the junction of p- and n-type semiconductor where free electrons and holes recombine?

• Saturation region

• Depletion layer

• Conduction region

• Barrier potential region

What is the voltage across the depletion region for a Germanium diode at 25°C?

• 0.3V

• 0.7V

• 1.0V

• 1.5V

What is the characteristic of a diode in reverse bias?

• Acts as a perfect conductor

• Acts as a perfect insulator

• Allows current flow easily

• Presents high resistance

What is the 2nd approximation model of a diode equivalent circuit?

• Ideal diode

• Piecewise-linear model

• Constant current source

• Constant voltage source

What is the sum of the ohmic resistance of the P and N region in a diode?

• 1.0 ohms

• Less than 1 ohm

• 0.5 ohms

• 1.5 ohms

What is the characteristic of a diode in the breakdown region?

• Acts as a perfect conductor

• Rapid increase in current

• Presents high resistance

• No current flow

What is the function of the avalanche effect in a diode?

• Reduces current flow

• Increases resistance

• Allows very large currents

• Stops current flow

What is the barrier potential of a silicon diode at 100°C?

• 1.0V

• 0.7V

• 0.3V

• 0.5V

What is the current I for the given network in a series dc configuration using 2nd approximation?

• 2.5 mA

• 3.0 mA

• 2.0 mA

• 1.5 mA