Introduction to Electricity: Master the Basics of Electrical Concepts

Question 1

Which property is NOT characteristic of electricity?

Accepted Answer

Existence as a form of visible energy

Answer

Ability to flow through conductors

Answer

Ability to be stored in batteries

Answer

Capacity to generate magnetic fields

Question 2

Which material allows electricity to pass through it with ease?

Accepted Answer

Metal

Answer

Rubber

Answer

Wood

Answer

Plastic

Question 3

What term describes the movement of electric charge?

Accepted Answer

Current

Answer

Voltage

Answer

Resistance

Answer

Power

Question 4

Which unit is used to measure voltage?

Accepted Answer

Volt

Answer

Ampere

Answer

Ohm

Answer

Watt

Question 5

What is the relationship between voltage (V), current (I), and resistance (R) known as?

Accepted Answer

Ohm's Law (V = IR)

Answer

Kirchhoff's Law (I = VR)

Answer

Joule's Law (R = VI)

Answer

Coulomb's Law (V = I + R)

Question 6

Which of the following is a typical example of an insulator?

Accepted Answer

Rubber gloves

Answer

Copper wire

Answer

Metal pipe

Answer

Salt water

Question 7

What is the SI unit of electric charge?

Accepted Answer

Coulomb

Answer

Ampere

Answer

Volt

Answer

Ohm

Question 8

Which formula is used to calculate the total resistance of resistors connected in a series circuit?

Accepted Answer

R_total = R1 + R2 + ... + Rn

Answer

R_total = 1 / (1 / R1 + 1 / R2 + ... + 1 / Rn)

Answer

R_total = R1 * R2 * ... * Rn

Answer

R_total = R1 / R2 / ... / Rn

Question 9

Which of the following is a defining characteristic of a conductor?

Accepted Answer

It allows electric current to flow freely

Answer

It is typically made of insulating materials like rubber or plastic

Answer

It has a high resistance to the flow of electric current

Answer

It does not conduct heat well

Question 10

What is the SI unit of electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 11

Which of the following formulas correctly calculates voltage?

Accepted Answer

Voltage = Current × Resistance

Answer

Voltage = Resistance ÷ Current

Answer

Voltage = Current ÷ Resistance

Answer

Voltage = Power × Current

Question 12

What is the International System of Units (SI) unit for electrical resistance?

Accepted Answer

Ohm

Answer

Ampere

Answer

Volt

Answer

Siemens

Question 13

What is the primary role of free electrons in the conduction of electric current?

Accepted Answer

They carry electric charge through the conductor

Answer

They create a magnetic field around the conductor

Answer

They increase the resistance of the conductor

Answer

They convert electrical energy into heat energy

Question 14

Which of the following is not a common source of electric charge?

Accepted Answer

Mechanical energy

Answer

Friction

Answer

Chemical reactions

Answer

Electromagnetic induction

Question 15

What is the main function of a resistor in an electric circuit?

Accepted Answer

To regulate the flow of electric current

Answer

To store electrical energy

Answer

To generate electrical energy

Answer

To protect the circuit from overcurrent

Question 16

Which of the following symbols represents voltage?

Accepted Answer

V

Answer

I

Answer

R

Answer

P

Question 17

When working with electricity, why is it essential to use insulated tools and wear appropriate Personal Protective Equipment (PPE)?

Accepted Answer

To prevent electric shock.

Answer

To protect equipment from damage.

Answer

To comply with health and safety regulations.

Answer

To make electrical work easier.

Question 18

The SI unit of electric current is known as:

Accepted Answer

Ampere

Answer

Coulomb

Answer

Volt

Answer

Ohm

Question 19

Copper is an example of what type of material in an electrical circuit?

Accepted Answer

Good conductor

Answer

Insulator

Answer

Superconductor

Question 20

When working with electricity, it is important to use insulated tools and wear rubber gloves. This is an example of:

Accepted Answer

Electrical safety precaution

Answer

Electrical installation

Answer

Electrical maintenance

Answer

Electrical troubleshooting

Question 21

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

Accepted Answer

Protect the circuit from excessive current

Answer

Control the flow of current

Answer

Increase the voltage in the circuit

Answer

Store electrical energy

Question 22

Which of the following factors affects the resistance of a wire?

Accepted Answer

Length, material, and cross-sectional area

Answer

Frequency and capacitance

Answer

Current and power

Answer

Temperature and voltage

Question 23

Batteries are examples of a:

Accepted Answer

Direct current (DC) source

Answer

Alternating current (AC) source

Answer

Transistorized current source

Answer

Capacitive current source

Question 24

In a series circuit, components are connected in what manner?

Accepted Answer

One after the other

Answer

In a closed loop

Answer

In parallel

Answer

Side by side