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Semiconductors and Diode Theory

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Materials that doesn't allow flow of electrons

a)

Conductor

b)

Insulator

c)

Semiconductor

d)

Semi-insulator

2.

Gap in energy between the bound state and the free state, between the valence band and conduction band.

a)

Energy Gap

b)

Conduction Gap

c)

Valence Gap

d)

Electron Gap

3.

In forward bias, the diode's anode is connected to the:

a)

Negative terminal

b)

Ground

c)

Positive terminal

d)

Open terminal

4.

Which diode emits light?

a)

Zener Diode

b)

LED

c)

Tunnel Diode

d)

Schottky Diode

5.

What component converts AC to DC?

a)

Resistor

b)

Capacitor

c)

Diode

d)

Transformer

6.

A transformer works on the principle of:

a)

Ohm's Law

b)

Magnetic Resonance

c)

Electromagnetic Induction

d)

Electric Field

7.

What kind of signal is output from a full-wave rectifier?

a)

Pure AC

b)

Constant DC

c)

Pulsating DC

d)

Zero Voltage

8.

The main purpose of a filter in power supplies is to:

a)

Block Current

b)

Increase Voltage

c)

Reduce Ripple

d)

Control Temperature

9.

Which diode is used for voltage regulation?

a)

Zener Diode

b)

LED

c)

Tunnel Diode

d)

Varactor Diode

10.

What does a capacitor store?

a)

Current

b)

Magnetic Field

c)

Voltage

d)

Resistance

11.

What happens to current flow in a diode when reverse-biased?

a)

Increases rapidly

b)

Zero current

c)

Small leakage current

d)

Acts like a resistor

12.

The peak inverse voltage (PIV) of a diode is:

a)

The maximum forward voltage

b)

The average voltage

c)

The maximum reverse voltage it can withstand

d)

Zero volts

13.

In a full-wave rectifier, how many diodes are used in a bridge configuration?

a)

1

b)

3

c)

4

d)

6

14.

Which diode is best suited for high-speed switching applications?

a)

Zener Diode

b)

Tunnel Diode

c)

Schottky Diode

d)

Photodiode

15.

The output of a half-wave rectifier contains:

a)

Pure DC

b)

DC with high ripple

c)

AC only

d)

No Voltage

16.

A photodiode operates when exposed to:

a)

Heat

b)

Voltage

c)

Light

d)

Sound

17.

Ripple voltage in a power supply is:

a)

The output DC Voltage

b)

The voltage loss in the diode

c)

The residual AC component

d)

The reverse breakdown voltage

18.

Which circuit removes a portion of the input signal without altering the remaining part?

a)

Clamper

b)

Amplifier

c)

Rectifier

d)

Clipper

19.

Which configuration uses both positive and negative halves of the AC cycle?

a)

Half-Wave Rectifier

b)

Zener Regulator

c)

Full-Wave Rectifier

d)

LED Array

20.

A clamper circuit is used to:

a)

Regulate Voltage

b)

Cut-off Signal Levels

c)

Shift the DC level of a signal

d)

Increase Frequency