Electrical Components: Interactive Quizzes for Electrical Maintenance Students

Question 1

What is the primary function of a resistor in an electrical circuit?

Accepted Answer

To control the flow of current

Answer

To store electrical charge

Answer

To amplify signals

Answer

To regulate voltage

Question 2

What is the SI unit used to measure capacitance?

Accepted Answer

Farads

Answer

Ohms

Answer

Henries

Answer

Volts

Question 3

Which type of capacitor is commonly used in high-frequency circuits?

Accepted Answer

Ceramic capacitors

Answer

Electrolytic capacitors

Answer

Tantalum capacitors

Answer

Film capacitors

Question 4

What is the main purpose of an inductor in an electrical circuit?

Accepted Answer

To store energy in a magnetic field

Answer

To decrease current flow

Answer

To increase current flow

Answer

To regulate voltage

Question 5

Which material is commonly used as the core of an inductor?

Accepted Answer

Iron

Answer

Copper

Answer

Aluminum

Answer

Plastic

Question 6

How does increasing the inductance of a coil in a circuit typically affect the current flow?

Accepted Answer

Decreases current flow

Answer

Increases current flow

Answer

Increases voltage

Answer

Decreases voltage

Question 7

What is the key difference between a polarized and a non-polarized capacitor?

Accepted Answer

Polarized capacitors must be connected with the correct polarity

Answer

Polarized capacitors have a higher capacitance value

Answer

Polarized capacitors can store more energy

Answer

Polarized capacitors have a longer lifespan

Question 8

What is a common purpose for connecting a capacitor in parallel with a resistor in a circuit?

Accepted Answer

To reduce noise

Answer

To increase voltage

Answer

To decrease current

Answer

To amplify signals

Question 9

In an AC circuit, how does an inductor's inductance affect the relationship between voltage and current?

Accepted Answer

Inductance causes a phase shift, where current lags behind voltage.

Answer

Inductance increases voltage and decreases current.

Answer

Inductance has no effect on voltage or current.

Answer

Inductance causes current to lead voltage.

Question 10

What is the unit of measurement for electrical resistance?

Accepted Answer

Ohms

Answer

Amperes

Answer

Volts

Answer

Farads

Question 11

What is the primary function of an inductor in an electrical circuit?

Accepted Answer

To store energy in a magnetic field

Answer

To block AC current

Answer

To increase voltage

Answer

To decrease current

Question 12

What type of resistor is adjustable?

Accepted Answer

Variable

Answer

Fixed

Answer

Linear

Answer

Non-linear

Question 13

What is the color code for a 100-ohm resistor?

Accepted Answer

Brown-Black-Brown

Answer

Red-Red-Brown

Answer

Orange-Orange-Brown

Answer

Yellow-Violet-Brown

Question 14

What is the purpose of a capacitor in a power supply circuit?

Accepted Answer

To filter out AC ripple

Answer

To store energy

Answer

To regulate voltage

Answer

To isolate components

Question 15

What is the unit of inductance?

Accepted Answer

Henry

Answer

Farad

Answer

Ohm

Answer

Siemens

Question 16

What is the primary function of a diode in an electrical circuit?

Accepted Answer

To allow current flow in only one direction

Answer

To amplify signals

Answer

To store energy

Answer

To regulate voltage

Question 17

What is the SI unit of electrical resistance?

Accepted Answer

Ohm

Answer

Ampere

Answer

Volt

Answer

Watt

Question 18

In which form do capacitors store electrical energy?

Accepted Answer

Electric field

Answer

Magnetic field

Answer

Kinetic energy

Answer

Gravitational potential energy

Question 19

Which property of inductors opposes changes in current flow?

Accepted Answer

Inductance

Answer

Capacitance

Answer

Resistance

Answer

Voltage

Question 20

For precise resistance values, which type of resistor is preferred?

Accepted Answer

Metal film resistor

Answer

Carbon composition resistor

Answer

Wirewound resistor

Answer

Variable resistor

Question 21

What is the primary function of a zener diode?

Accepted Answer

Voltage regulation

Answer

Signal amplification

Answer

AC current rectification

Answer

Overcurrent protection

Question 22

Which type of capacitor is commonly used in high-frequency applications?

Accepted Answer

Ceramic capacitor

Answer

Electrolytic capacitor

Answer

Film capacitor

Answer

Tantalum capacitor

Question 23

What is the main purpose of a transformer?

Accepted Answer

Voltage conversion

Answer

Circuit isolation

Answer

Current regulation

Answer

Electrical energy storage

Question 24

Which type of electrical switch is designed to interrupt high currents?

Accepted Answer

Circuit breaker

Answer

Toggle switch

Answer

Limit switch

Answer

Pressure switch

Question 25

What is the primary purpose of a fuse in an electrical circuit?

Accepted Answer

Overcurrent prevention

Answer

Voltage regulation

Answer

Faulty component isolation

Answer

Electrical energy storage

Question 26

Which electrical component is specifically used to limit and regulate the flow of current in a circuit?

Accepted Answer

Resistor

Answer

Capacitor

Answer

Inductor

Answer

Transformer

Question 27

For capacitance, which unit of measurement is commonly used?

Accepted Answer

Farads

Answer

Ohms

Answer

Henrys

Answer

Volts

Question 28

In an inductor, which property is measured in Henrys?

Accepted Answer

Inductance

Answer

Resistance

Answer

Capacitance

Answer

Voltage

Question 29

Within an electrical circuit, what is the primary function of a capacitor?

Accepted Answer

Storing electrical energy

Answer

Regulating current flow

Answer

Blocking DC signals

Answer

Amplifying voltage

Question 30

Which electrical component generates a magnetic field when current flows through it?

Accepted Answer

Inductor

Answer

Resistor

Answer

Capacitor

Answer

Diode

Question 31

In an electrical circuit, what law describes the relationship between resistance, current, and voltage?

Accepted Answer

Ohms Law

Answer

Kirchhoff's Voltage Law

Answer

Kirchhoff's Current Law

Answer

Faraday's Law

Question 32

What is the main purpose of a transformer in an electrical circuit?

Accepted Answer

Stepping up or down voltage

Answer

Isolating circuits

Answer

Regulating current flow

Answer

Storing energy

Question 33

Which electrical component is used to convert alternating current (AC) to direct current (DC)?

Accepted Answer

Rectifier

Answer

Filter

Answer

Regulator

Answer

Oscillator

Question 34

What is the primary purpose of an electrical fuse?

Accepted Answer

Protecting circuits from excessive current

Answer

Regulating voltage

Answer

Storing energy

Answer

Isolating components

Question 35

Which of the following is NOT a characteristic of resistors?

Accepted Answer

They store electrical energy.

Answer

They impede the flow of current.

Answer

Their resistance is measured in ohms.

Answer

They can be used to control the current flowing through a circuit.

Question 36

What is the primary function of a capacitor in an electrical circuit?

Accepted Answer

To store electrical energy

Answer

To impede the flow of current

Answer

To dissipate electrical energy

Answer

To regulate voltage

Question 37

Which of the following is NOT a type of inductor?

Accepted Answer

Capacitor

Answer

Air-core inductor

Answer

Iron-core inductor

Answer

Transformer

Question 38

What is the primary purpose of a transformer?

Accepted Answer

To change the voltage of an AC signal

Answer

To convert AC to DC

Answer

To store electrical energy

Answer

To regulate current flow

Question 39

What is the unit of measurement for capacitance?

Accepted Answer

Farad

Answer

Henry

Answer

Ohm

Answer

Volt

Question 40

What is the role of the dielectric material in a capacitor?

Accepted Answer

To increase capacitance

Answer

To impede the flow of current

Answer

To store electrical energy

Answer

To decrease inductance

Question 41

Which equation correctly describes the relationship between voltage (V) and the rate of change of current (di/dt) in an inductor (L)?

Accepted Answer

V = L(di/dt)

Answer

I = L(dv/dt)

Answer

V = I/L

Answer

I = V/L

Question 42

To calculate electrical power in a circuit, what mathematical operation do we perform?

Accepted Answer

Multiply Voltage by Current

Answer

Divide Voltage by Current

Answer

Multiply Current by Resistance

Answer

Add Voltage to Resistance

Question 43

What is the main function of a transformer in an electrical system?

Accepted Answer

Regulate voltage levels

Answer

Store electrical charge

Answer

Limit current flow

Answer

Generate alternating current

Question 44

Which electrical component primarily stores energy in its electric field?

Accepted Answer

Capacitor

Answer

Resistor

Answer

Inductor

Question 45

The unit of measurement for inductance is the:

Accepted Answer

Henry

Answer

Farad

Answer

Coulomb

Answer

Ohm

Question 46

Which type of resistor is specifically designed to limit current flow in an electrical circuit?

Accepted Answer

Current-limiting resistor

Answer

Pull-up resistor

Answer

Bleeder resistor

Answer

Shunt resistor

Question 47

The primary purpose of a fuse in an electrical circuit is to:

Accepted Answer

Protect the circuit from excessive current

Answer

Filter signals

Answer

Regulate voltage

Answer

Store energy

Question 48

Which electrical component is used to manually control the flow of current in a circuit?

Accepted Answer

Switch

Answer

Transistor

Answer

Relay

Answer

Diode

Question 49

Which type of diode allows current to flow in only one direction?

Accepted Answer

PN-junction diode

Answer

Schottky diode

Answer

Light-emitting diode (LED)

Answer

Zener diode

Question 50

The primary purpose of a transistor is to:

Accepted Answer

Amplify and switch signals

Answer

Store energy

Answer

Regulate voltage

Answer

Isolate circuits

Question 51

Which electrical component converts alternating current (AC) voltage to direct current (DC) voltage?

Accepted Answer

Rectifier

Answer

Transformer

Answer

Capacitor

Answer

Inverter

Question 52

What is the primary function of a transformer in an electrical circuit?

Accepted Answer

Change the voltage level

Answer

Filter signals

Answer

Store energy

Answer

Regulate current