Basic Electronics

What is the main function of a PN junction diode?

• To store electrical charge

• To allow current flow in one direction and to block it in the opposite direction

• To regulate voltage in a circuit

• To emit light when current flows through it

How does a Zener diode differ from a regular diode?

• A Zener diode operates in the reverse breakdown region to maintain a constant voltage, while a regular diode does not.

• A Zener diode has a higher forward voltage drop than a regular diode.

• A Zener diode is used for AC circuits, while a regular diode is used for DC circuits.

• A Zener diode is used for signal processing, while a regular diode is used for power rectification.

Which statement is correct about a clipper circuit?

• A clipper circuit works by amplifying the input signal to increase its amplitude.

• A clipper circuit uses diodes to limit the output voltage by clipping off the excess part of the input signal.

• Clipper circuits operate by converting AC signals to DC signals.

• The working principle of a clipper circuit involves using resistors to filter out unwanted frequencies.

What is the purpose of a clamper circuit?

• To shift the DC level of a signal without changing its shape.

• To filter out noise from an input signal

• To convert Alternating Current to DC

• To amplify the signal form a low level to a high level

What are the three regions of operation for a transistor?

• Source, Drain, Gate

• Emitter, Base, Collector

• Forward, Reverse, Neutral

• Cutoff, Active, Saturation

What is the symbol for a PN junction diode in a circuit diagram?

• Arrow pointing towards a line

• Square with a diagonal line

• Circle with a line through it

• Arrow pointing away from a line

What is the breakdown voltage of a Zener diode?

• Variable voltage based on external conditions

• No breakdown voltage

• Depends on the color of the diode and the resistance

• Fixed voltage determined by doping level

How does a positive clipper circuit work?

• Transistors are used to clip off the negative portion of the input signal in a positive clipper circuit.

• Diodes are used to clip off the negative portion of the input signal in a positive clipper circuit.

• Positive clipper circuits completely remove the positive portion of the input signal.

• Positive clipper circuits amplify the negative portion of the input signal.

What is the function of a transistor in an electronic circuit?

• Regulates the resistance

• Stores electrical charge

• Amplifies the voltage

• Controls the flow of current

What is the difference between an NPN and PNP transistor?

• The main difference is the order of the semiconductor layers.

• The color of the transistors

• The size of the transistors

• The temperature range of the transistors