Electrical Components: Master the Fundamentals of Electrical Circuits

Question 1

In an electrical circuit, what is the main purpose of resistors?

Accepted Answer

To regulate current flow

Answer

To enable unrestricted current flow

Answer

To store electrical energy

Question 2

What are electrical components? Give specific examples.

Accepted Answer

Devices that control electricity flow in circuits, like resistors, capacitors, and inductors.

Answer

Materials for connecting components, like wires and terminals.

Answer

Devices for storing electricity, like batteries and capacitors.

Answer

Tools for measuring electrical properties, like multimeters and oscilloscopes.

Question 3

Which electrical component exhibits resistance to the flow of electric current?

Accepted Answer

Resistor

Answer

Capacitor

Answer

Inductor

Question 4

What is the SI unit for measuring capacitance?

Accepted Answer

Farad (F)

Answer

Ohm (Ω)

Answer

Ampere (A)

Answer

Henry (H)

Question 5

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

Accepted Answer

To maintain a stable voltage level

Answer

To store energy

Answer

To limit current

Answer

To enhance signal strength

Question 6

Which electrical component exhibits non-linear behavior?

Accepted Answer

Diode

Answer

Capacitor

Answer

Resistor

Answer

Inductor

Question 7

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

Accepted Answer

To provide protection against excessive current

Answer

To regulate voltage

Answer

To store energy

Answer

To amplify signals

Question 8

Which of the following is a common application for capacitors in electrical circuits?

Accepted Answer

Energy storage and filtering

Answer

Current limiting

Answer

Signal amplification

Answer

Voltage regulation

Question 9

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

Accepted Answer

To alter voltage levels

Answer

To control current flow

Answer

To amplify signals

Answer

To store energy

Question 10

Which unit is used to measure the resistance of a component?

Accepted Answer

Ohm (Ω)

Answer

Ampere (A)

Answer

Farad (F)

Answer

Volt (V)

Question 11

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

Accepted Answer

Stores electrical energy

Answer

Controls current flow

Answer

Provides voltage regulation

Answer

Limits voltage fluctuations

Question 12

Inductors are known to possess which property?

Accepted Answer

Oppose changes in current flow

Answer

Store energy in an electric field

Answer

Amplify voltage

Answer

Conduct electricity without resistance

Question 13

Which law describes the relationship between voltage, current, and resistance in an electrical circuit?

Accepted Answer

Ohm's Law: V = I × R

Answer

Faraday's Law: V = -dΦ/dt

Answer

Lenz's Law: Induced current opposes change in magnetic flux

Answer

Kirchhoff's Current Law: ΣI_in = ΣI_out

Question 14

Which type of resistor is designed to limit current flow?

Accepted Answer

Current-limiting resistor

Answer

Bleeder resistor

Answer

Pull-up resistor

Question 15

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

Accepted Answer

Maintains a stable voltage output

Answer

Provides overcurrent protection

Answer

Amplifies voltage

Answer

Filters out electrical noise

Question 16

In a power supply circuit, what is the function of an inductor?

Accepted Answer

Filters out AC ripple

Answer

Regulates voltage

Answer

Limits current flow

Answer

Provides electrical isolation

Question 17

Which material is commonly used in the manufacturing of resistors?

Accepted Answer

Carbon

Answer

Aluminum

Answer

Copper

Answer

Iron

Question 18

How does inductance relate to the number of turns in an inductor?

Accepted Answer

Inductance is proportional to the square of the number of turns

Answer

Inductance is inversely proportional to the number of turns

Answer

Inductance is independent of the number of turns

Question 19

Identify the property that is NOT associated with a resistor.

Accepted Answer

Current

Answer

Resistance

Answer

Power

Answer

Voltage

Question 20

Which of the following effects does a capacitor with a higher capacitance value have?

Accepted Answer

Increased charge storage capacity

Answer

Faster discharge rate

Answer

Elevated voltage rating

Answer

Reduced risk of short circuits

Question 21

Which unit of measurement is used to quantify inductance?

Accepted Answer

Henry

Answer

Farad

Answer

Ohm

Answer

Ampere

Question 22

What type of circuit is formed when a resistor, capacitor, and inductor are connected in series?

Accepted Answer

RLC circuit

Answer

RC circuit

Answer

RL circuit

Answer

LC circuit

Question 23

Which property of a capacitor is directly proportional to the voltage across it?

Accepted Answer

Stored charge

Answer

Resistance of the circuit

Answer

Current flowing through it

Answer

Frequency of alternating current

Question 24

What component is used to safeguard electrical circuits from excessive current?

Accepted Answer

Fuse

Answer

Resistor

Answer

Capacitor

Answer

Inductor

Question 25

What primary function does a diode perform in electronic circuits?

Accepted Answer

Permits current flow in a single direction

Answer

Regulates voltage levels

Answer

Blocks current flow in both directions

Answer

Amplifies electrical signals

Question 26

Identify the type of solid-state relay exemplified by a Triac.

Accepted Answer

Triac

Answer

Inductor

Answer

Resistor

Answer

Capacitor

Question 27

Which of the following is a type of active electrical component?

Accepted Answer

Transistor

Answer

Resistor

Answer

Capacitor

Answer

Inductor

Question 28

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

Accepted Answer

Limit current flow and dissipate power

Answer

Store electrical energy

Answer

Induce magnetic fields

Answer

Amplify signals

Question 29

Which of the following is the unit of capacitance?

Accepted Answer

Farad

Answer

Ohm

Answer

Tesla

Answer

Henry

Question 30

What is the effect of increasing the capacitance of a capacitor in a circuit?

Accepted Answer

Increases the amount of charge it can store

Answer

Increases the voltage across it

Answer

Decreases the amount of charge it can store

Answer

Decreases the voltage across it

Question 31

Which of the following is NOT a property of an inductor?

Accepted Answer

Current limitation

Answer

Magnetic field generation

Answer

Energy storage

Answer

Voltage induction

Question 32

What is the primary application of a transformer?

Accepted Answer

Voltage conversion and isolation

Answer

Capacitor conversion

Answer

Current conversion

Answer

Resistor conversion

Question 33

What is the purpose of a relay in an electrical system?

Accepted Answer

Control circuits remotely using a small electrical signal

Answer

Amplify signals

Answer

Store energy

Answer

Filter noise

Question 34

Which of the following is a characteristic of a semiconductor diode?

Accepted Answer

Allows current to flow in one direction only

Answer

Has high resistance

Answer

Allows current to flow in both directions

Question 35

What is the main function of a transistor in an electrical circuit?

Accepted Answer

Amplify or switch electronic signals

Answer

Limit current flow

Answer

Control voltage levels

Answer

Store energy

Question 36

A resistor with color bands Red, Violet, Orange, Gold has a tolerance of what percentage?

Accepted Answer

±5%

Answer

±1%

Answer

±20%

Answer

±10%

Question 37

How does the inductive reactance of an inductor change when the AC current frequency decreases?

Accepted Answer

Inductive reactance decreases

Answer

Inductive reactance stays the same

Answer

Inductive reactance increases

Answer

Inductive reactance becomes zero

Question 38

What is the SI unit for capacitance?

Accepted Answer

Farad

Answer

Volt

Answer

Ohm

Answer

Henry

Question 39

What is the primary purpose of a resistor in a circuit?

Accepted Answer

To limit current flow

Answer

To store electrical energy

Answer

To amplify the input signal

Answer

To convert AC to DC

Question 40

Which type of capacitor is commonly used for smoothing voltage in power supplies?

Accepted Answer

Electrolytic capacitor

Answer

Mica capacitor

Answer

Variable capacitor

Answer

Ceramic capacitor

Question 41

Find the combined resistance of three 20 ohm resistors connected in parallel.

Accepted Answer

6.67 ohms

Answer

60 ohms

Answer

20 ohms

Answer

0.06 ohms

Question 42

In which form does an inductor store energy?

Accepted Answer

Magnetic field

Answer

Electric field

Answer

Heat

Answer

Light