wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Power Electronics Quiz Unit 17

Total questions: 30

Worksheet time: 15mins

Name
Class
Date
1.

What is the primary function of a power electronic device?

a)

Store electrical energy

b)

Generate electrical energy

c)

Modify a form of electrical energy

d)

Insulate electrical components

e)

Conduct heat

2.

Which material is typically used in the construction of a PN junction diode?

a)

Copper

b)

Aluminum

c)

Silicon

d)

Lead

e)

Iron

3.

What happens to the current in a PN junction diode in forward bias?

a)

Decreases exponentially

b)

Remains constant

c)

Increases exponentially

d)

Fluctuates randomly

e)

Stops completely

4.

Which of the following is a characteristic of an ideal diode?

a)

Infinite resistance in forward bias

b)

Zero resistance in reverse bias

c)

Zero resistance in forward bias

d)

Infinite current in reverse bias

e)

None of the above

5.

A Bipolar Junction Transistor (BJT) is controlled by:

a)

Current

b)

Voltage

c)

Resistance

d)

Capacitance

e)

Inductance

6.

What type of current flow does a diode permit?

a)

Alternating current (AC) only

b)

Both AC and DC in either direction

c)

Direct current (DC) in one direction

d)

No current at all

e)

Varies with frequency

7.

In a BJT, which terminal controls the flow of current between the collector and emitter?

a)

Base

b)

Collector

c)

Emitter

d)

Gate

e)

Source

8.

What is the main difference between a MOSFET and a BJT?

a)

BJTs are voltage-controlled, MOSFETs are current-controlled

b)

BJTs are current-controlled, MOSFETs are voltage-controlled

9.

Which of the following is the symbol for a diode?

a)

A circle with a plus sign

b)

A triangle pointing to a line

c)

A square with a cross

d)

Two parallel lines

e)

A circle with an arrow

10.

What is the depletion region in a PN junction?

a)

A highly conductive area

b)

An insulating layer

c)

A region with no free charge carriers

d)

The point of highest voltage

e)

The base of a transistor

11.

When a diode is in reverse bias, it:

a)

Allows maximum current flow

b)

Blocks current flow

c)

Acts as a resistor

d)

Increases temperature

e)

Functions as a capacitor

12.

The switching speed of a MOSFET is generally:

a)

Slow

b)

Moderate

c)

Fast

d)

Extremely slow

e)

Depends on the temperature

13.

The enhancement mode MOSFET is turned on by:

a)

A negative gate voltage

b)

A positive gate voltage

c)

Current through the gate

d)

Decreasing the source voltage

e)

Increasing the drain voltage

14.

The IGBT is mainly used for:

a)

Low-power applications

b)

High-speed switching

c)

High-voltage applications

d)

Analog signal processing

e)

Audio amplification

15.

A thyristor is also known as:

a)

SCR

b)

BJT

c)

Diode

d)

MOSFET

e)

Capacitor

16.

In an AC to DC rectification circuit, the diode acts as:

a)

An amplifier

b)

A switch

c)

A filter

d)

A transformer

e)

A resistor

17.

Which parameter determines the switching speed of a power electronic device?

a)

Resistance

b)

Capacitance

18.

What is the function of a flyback diode in a circuit?

a)

Generate AC signals

b)

Control power flow

c)

Suppress voltage spikes

d)

Increase circuit impedance

e)

Reduce circuit noise

19.

Which region of operation in a BJT corresponds to the "on" state?

a)

Cut-off

b)

Active

c)

Saturation

d)

Reverse

e)

Linear

20.

How many layers does an SCR consist of?

a)

Two

b)

Three

c)

Four

d)

Five

e)

Six

21.

A Triac is used to control:

a)

DC only

b)

AC only

c)

Both AC and DC

d)

Light signals

e)

Temperature

22.

In the context of a MOSFET, "VGS" refers to:

a)

Voltage across gate and source

b)

Voltage across drain and source

c)

Current between gate and source

d)

Voltage between collector and emitter

23.

What effect does increasing the firing angle of an SCR have on its output voltage?

a)

Decreases output voltage

b)

Increases output voltage

c)

Keeps output voltage constant

d)

Causes noise in the circuit

24.

In a DC motor control circuit using a MOSFET, which method is typically used to control the speed?

a)

Changing motor resistance

b)

Varying supply voltage

c)

Pulse-width modulation (PWM)

d)

Increasing temperature

25.

Which of the following devices is unipolar?

a)

BJT

b)

SCR

c)

Diode

d)

MOSFET

26.

The primary application of a thyristor in AC circuits is:

a)

Amplification

b)

Rectification

c)

Modulation

d)

Oscillation

27.

A PN junction diode exhibits low resistance in:

a)

Reverse bias

b)

Forward bias

c)

No bias

d)

Both forward and reverse bias

e)

Neutral bias

28.

Which material is often used for high-power semiconductor devices?

a)

Carbon

b)

Germanium

c)

Gallium arsenide

d)

Silicon carbide (SiC)

e)

Copper

29.

Which device is best suited for high-frequency switching applications?

a)

BJT

b)

Thyristor

c)

MOSFET

d)

Triac

e)

Inductor

30.

How is the gate current of an SCR typically controlled?

a)

By adjusting the load resistance

b)

By applying a negative voltage

c)

By adjusting the firing angle

d)

By controlling the AC frequency

e)

By changing the capacitance

Similar Resources on Wayground

HALF term Learning Check Dip 103

30 questions

HALF term Learning Check Dip 103

quiz

Worksheet

•

1st Grade