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Worksheets

Basic Electronics

Total questions: 18

Worksheet time: 9mins

Name
Class
Date
1.

What is the main function of a PN junction diode?

a)

To store electrical charge

b)

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

c)

To regulate voltage in a circuit

d)

To emit light when current flows through it

2.

How does a Zener diode differ from a regular diode?

a)

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

b)

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

c)

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

d)

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

3.

Which statement is correct about a clipper circuit?

a)

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

b)

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

c)

Clipper circuits operate by converting AC signals to DC signals.

d)

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

4.

What is the purpose of a clamper circuit?

a)

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

b)

To filter out noise from an input signal

c)

To convert Alternating Current to DC

d)

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

5.

What are the three regions of operation for a transistor?

a)

Source, Drain, Gate

b)

Emitter, Base, Collector

c)

Forward, Reverse, Neutral

d)

Cutoff, Active, Saturation

6.

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

a)

Arrow pointing towards a line

b)

Square with a diagonal line

c)

Circle with a line through it

d)

Arrow pointing away from a line

7.

What is the breakdown voltage of a Zener diode?

a)

Variable voltage based on external conditions

b)

No breakdown voltage

c)

Depends on the color of the diode and the resistance

d)

Fixed voltage determined by doping level

8.

How does a positive clipper circuit work?

a)

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

b)

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

c)

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

d)

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

9.

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

a)

Regulates the resistance

b)

Stores electrical charge

c)

Amplifies the voltage

d)

Controls the flow of current

10.

What is the difference between an NPN and PNP transistor?

a)

The main difference is the order of the semiconductor layers.

b)

The color of the transistors

c)

The size of the transistors

d)

The temperature range of the transistors

11.

What happens when a diode is forward biased?

a)

Current flows through the diode in the forward direction

b)

Diode emits light

c)

Voltage decreases across the diode

d)

Diode becomes a closed circuit

12.

What is the role of a Zener diode in voltage regulation?

a)

A Zener diode regulates voltage by increasing voltage across its terminals

b)

A Zener diode regulates voltage by decreasing voltage across its terminals

c)

A Zener diode regulates voltage by maintaining a constant voltage across its terminals within a specified range.

d)

A Zener diode regulates voltage by converting voltage into current

13.

Explain the concept of biasing in a transistor.

a)

Biasing is not necessary in transistors for proper functioning.

b)

Biasing in a transistor is the process of giving proper voltages at its different terminals.

c)

Biasing is the process of setting a fixed AC voltage at the input terminal of the transistor.

d)

Biasing involves adjusting the output terminal of the transistor to control amplification.

14.

How does a negative clamper circuit function?

a)

A negative clamper circuit inverts the input signal during the positive half-cycle.

b)

A negative clamper circuit shifts the waveform in the positive direction by discharging a capacitor during the negative half-cycle.

c)

A negative clamper circuit shifts the waveform in the negative direction by charging a capacitor to the peak negative during the negative half-cycle.

d)

A negative clamper circuit amplifies the input signal during the negative half-cycle.

15.

What is the purpose of a base terminal in a transistor?

a)

To generate heat

b)

To emit light

c)

To store data

d)

To control current flow

16.

What is the significance of the depletion region in a PN junction diode?

a)

The depletion region creates a potential barrier and controls current flow in a PN junction diode.

b)

The depletion region has no effect on the behavior of a PN junction diode.

c)

The depletion region is responsible for generating light in a PN junction diode.

d)

The depletion region increases the current flow in a PN junction diode.

17.

What is the application of a clipper circuit in signal processing?

a)

Filtering out noise from the signal

b)

Increasing the signal frequency

c)

Inverting the signal phase

d)

Limiting the amplitude of a signal by clipping off the peaks of the waveform.

18.

How does a Zener diode maintain a constant voltage across its terminals?

a)

By operating in the reverse breakdown region and conducting when the voltage reaches the Zener voltage.

b)

By heating up and increasing resistance

c)

By short-circuiting the terminals

d)

By emitting light when the voltage changes