Understanding Diode Characteristics

What happens to the current in a diode during forward bias?

• The current fluctuates randomly.

• The current increases significantly.

• The current decreases significantly.

• The current remains constant.

Describe the behavior of a diode in reverse bias conditions.

• A diode in reverse bias allows a large amount of current to flow in the reverse direction.

• A diode in reverse bias blocks current flow, allowing only a small leakage current.

• A diode in reverse bias conducts current freely without any restriction.

• A diode in reverse bias behaves like a short circuit, providing no resistance to current.

List two common applications of rectifier diodes.

• Signal modulation circuits

• High-frequency amplifiers

• Voltage regulators

• Power supply circuits, Battery charging applications

Explain the diode current-voltage relationship in the forward region.

• The diode current-voltage relationship is quadratic, described by I = aV^2.

• The diode current-voltage relationship in the forward region is exponential, described by I = I0 (e^(qV/kT) - 1).

• The diode current-voltage relationship is constant regardless of voltage.

• The diode current-voltage relationship is linear, described by I = V/R.

What is the significance of the knee voltage or cut-in voltage in a diode's I-V curve?

• The knee voltage indicates the reverse bias breakdown voltage of the diode.

• The knee voltage indicates the threshold at which a diode starts to conduct current significantly.

• The knee voltage is the point where a diode stops conducting current entirely.

• The knee voltage represents the maximum voltage a diode can withstand without damage.

This circuit is ...

• series circuit

• half-wave rectifier

• full-wave rectifier

• diode breakdown

The process of converting the AC current into DC current is called...

• Filtering

• Rectification

• Smoothing

• Step-down