Introduction to Electricity: Master the Basics of Electrical Fundamentals

Question 1

Which of the following is NOT a type of electrical charge?

Accepted Answer

Neutral

Answer

Positive

Answer

Negative

Question 2

Which property is NOT characteristic of an electrical conductor?

Accepted Answer

High resistance to the flow of electrons

Answer

Low resistance to the flow of electrons

Answer

Presence of free electrons

Answer

Ability to transfer electrical energy

Question 3

Which of the following is NOT a type of electrical charge?

Accepted Answer

Neutral

Answer

Positive

Answer

Negative

Question 4

What is the fundamental unit of electric charge in the International System of Units (SI)?

Accepted Answer

Coulomb (C)

Answer

Volt (V)

Answer

Ohm (Ω)

Answer

Ampere (A)

Question 5

Which material does NOT allow electric current to flow through it easily?

Accepted Answer

Insulator

Answer

Conductor

Answer

Superconductor

Answer

Semi-conductor

Question 6

What is the SI unit of electrical energy?

Accepted Answer

Joule (J)

Answer

Watt (W)

Answer

Ampere (A)

Answer

Coulomb (C)

Question 7

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

Accepted Answer

To interrupt the circuit if current exceeds a safe limit

Answer

To store electrical energy

Answer

To regulate the voltage in the circuit

Answer

To convert AC current to DC current

Question 8

Which component can convert electrical energy into mechanical energy?

Accepted Answer

Motor

Answer

Battery

Answer

Transformer

Answer

Resistor

Question 9

What is the SI unit of electrical resistance?

Accepted Answer

Ohm (Ω)

Answer

Ampere (A)

Answer

Coulomb (C)

Answer

Volt (V)

Question 10

Which material is a good conductor of electricity?

Accepted Answer

Copper

Answer

Wood

Answer

Rubber

Answer

Plastic

Question 11

What is the SI unit of electric charge?

Accepted Answer

Coulomb

Answer

Joule

Answer

Ampere

Answer

Ohm

Question 12

Which of the following materials allows electric current to flow easily?

Accepted Answer

Conductor

Answer

Insulator

Answer

Semiconductor

Answer

Dielectric

Question 13

Which of the following relationships describes Ohm's law?

Accepted Answer

Voltage = Current × Resistance

Answer

Resistance = Current × Voltage

Answer

Power = Voltage × Current

Answer

Current = Voltage × Resistance

Question 14

What is the unit of measurement for electrical power?

Accepted Answer

Watt

Answer

Volt

Answer

Ampere

Answer

Joule

Question 15

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

Accepted Answer

To protect the circuit from excessive current

Answer

To convert AC to DC

Answer

To store electrical energy

Answer

To regulate voltage in the circuit

Question 16

Which of the following is a fundamental characteristic of an electrical circuit?

Accepted Answer

It provides a closed path for the flow of electric current

Answer

It converts electrical energy into other forms of energy

Answer

It regulates voltage in the circuit

Answer

It stores electrical energy

Question 17

What is the primary function of an electrical transformer?

Accepted Answer

To change the voltage level of an AC signal

Answer

To regulate the current in a circuit

Answer

To store electrical energy

Answer

To convert AC to DC

Question 18

Select the most accurate definition of electricity:

Accepted Answer

The flow of electrical charge through a conductor

Answer

A form of energy capable of powering electrical devices

Answer

An invisible force that can attract or repel particles

Answer

A physical state of matter distinct from solid, liquid or gas

Question 19

Which type of material allows electric charge to flow with minimal resistance?

Accepted Answer

Conductor

Answer

Semiconductor

Answer

Superconductor

Answer

Insulator

Question 20

The formula for calculating electrical power, measured in watts, is:

Accepted Answer

Voltage multiplied by current

Answer

Current multiplied by resistance

Answer

Resistance divided by current

Answer

Voltage divided by current

Question 21

The type of electrical charge carried by electrons is:

Accepted Answer

Negative

Answer

Neutral

Answer

Positive

Answer

Alternating

Question 22

What unit is used to measure electrical potential difference?

Accepted Answer

Volt

Answer

Ampere

Answer

Watt

Answer

Ohm

Question 23

Identify the device specifically designed to measure electric current:

Accepted Answer

Ammeter

Answer

Voltmeter

Answer

Wattmeter

Answer

Ohmmeter

Question 24

When working with electricity, which safety precaution is of utmost importance?

Accepted Answer

Always use insulated tools and wear appropriate protective gear

Answer

Ignore warning signs and safety instructions

Answer

Work independently to minimize distractions

Answer

Avoid touching live wires or electrical components

Question 25

In which type of electrical circuit does current flow in only one direction?

Accepted Answer

Direct Current (DC) circuit

Answer

Series circuit

Answer

Parallel circuit

Answer

Alternating Current (AC) circuit

Question 26

The SI unit of electric charge is:

Accepted Answer

Coulomb

Answer

Ampere

Answer

Volt

Answer

Ohm

Question 27

An insulator is a material that:

Accepted Answer

Does not conduct electricity easily

Answer

Conducts electricity easily

Answer

Stores electric charge

Question 28

Which of the following is NOT a good conductor of electricity?

Accepted Answer

Rubber

Answer

Copper

Answer

Silver

Answer

Aluminum

Question 29

Ohm's law expresses the relationship between:

Accepted Answer

Voltage, current, and resistance

Answer

Resistance, power, and current

Answer

Power, current, and voltage

Question 30

Which of the following has the highest electrical resistance?

Accepted Answer

Wood

Answer

Copper

Answer

Aluminum

Answer

Silver

Question 31

The unit of electrical power is:

Accepted Answer

Watt

Answer

Ampere

Answer

Volt

Question 32

Which of the following is an example of a non-renewable energy source?

Accepted Answer

Natural gas

Answer

Wind power

Answer

Solar power

Answer

Hydroelectric power

Question 33

The term for the complete path through which electric current flows is:

Accepted Answer

Circuit

Answer

Node

Answer

Loop

Answer

Branch

Question 34

A common electrical measurement instrument used to measure voltage, current, and resistance is a:

Accepted Answer

Multimeter

Answer

Ammeter

Answer

Ohmmeter

Answer

Voltmeter

Question 35

Define electricity.

Accepted Answer

The flow of electric charge

Answer

A magnetic field generated by moving charges

Answer

A type of electromagnetic wave

Answer

A form of energy that can power devices

Question 36

Which material readily allows electric current to pass through it?

Accepted Answer

Copper

Answer

Plastic

Answer

Rubber

Answer

Wood

Question 37

Ohm's law describes the relationship between:

Accepted Answer

Current, voltage, and resistance in a circuit

Answer

Resistance, current, and power in a circuit

Answer

Voltage, power, and energy in a circuit

Question 38

What is the unit of electrical power?

Accepted Answer

Watts

Answer

Amperes

Answer

Ohms

Answer

Volts

Question 39

Which source of electrical energy is replenished naturally?

Accepted Answer

Solar energy

Answer

Nuclear energy

Answer

Coal

Answer

Natural gas

Question 40

In a complete circuit, what enables current to flow?

Accepted Answer

A closed loop

Answer

A switch

Answer

A voltage source

Answer

A resistor

Question 41

Which safety measure is essential when working with electricity?

Accepted Answer

Wearing insulated gloves

Answer

Working on circuits while standing in water

Answer

Using a wet cloth to clean electrical equipment

Answer

Touching live wires with bare hands

Question 42

What is the SI unit for measuring electric charge?

Accepted Answer

Coulomb

Answer

Ampere

Answer

Volt

Answer

Ohm

Question 43

Which characteristic is a defining feature of insulators?

Accepted Answer

Impeding the flow of electric current

Answer

Permitting the easy flow of electric current

Answer

Conducting heat efficiently

Answer

Exhibiting strong magnetic properties

Question 44

In a simple circuit, the relationship between voltage (V), current (I), and resistance (R) is given by:

Accepted Answer

V = I × R

Answer

R = V ÷ I

Answer

V = I ÷ R

Answer

I = V × R

Question 45

Define electricity.

Accepted Answer

A form of energy that can flow through materials.

Answer

A type of radiation that damages cells.

Answer

A force that attracts or repels objects.

Question 46

Which material conducts electricity?

Accepted Answer

Copper

Answer

Wood

Answer

Rubber

Answer

Glass

Question 47

According to Ohm's Law, how are voltage (V), current (I), and resistance (R) related?

Accepted Answer

V = I * R

Answer

R / I = V

Answer

I / V = R

Answer

V / I = R

Question 48

What is the unit of electrical power?

Accepted Answer

Watt

Answer

Volt

Answer

Ohm

Answer

Ampere

Question 49

Which circuit type offers only one path for electricity to flow?

Accepted Answer

Series circuit

Answer

Parallel circuit

Answer

Mixed circuit

Answer

Open circuit

Question 50

Explain the key difference between AC and DC electrical currents.

Accepted Answer

AC reverses direction periodically, while DC flows in one direction.

Answer

AC has higher voltage than DC.

Answer

AC is used in batteries, while DC is used in generators.

Question 51

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

Accepted Answer

To protect the circuit from overcurrent by breaking the circuit.

Answer

To store electrical energy.

Answer

To provide a low resistance path for electricity to flow.

Question 52

What is the potential difference between two points in an electrical circuit called?

Accepted Answer

Voltage

Answer

Current

Answer

Power

Answer

Resistance

Question 53

Identify the SI unit for measuring electric charge.

Accepted Answer

Coulomb

Answer

Volt

Answer

Ohm

Answer

Ampere