Electricity Quiz: Test Your Knowledge of Electric Power

Question 1

Which unit is used to measure electric current?

Accepted Answer

Ampere

Answer

Coulomb

Answer

Volt

Answer

Ohm

Question 2

Which factor does NOT directly influence the resistance of a wire in an electrical circuit?

Accepted Answer

Voltage

Answer

Length

Answer

Cross-sectional area

Answer

Material composition

Question 3

Which material allows electricity to flow through it easily?

Accepted Answer

Copper

Answer

Rubber

Answer

Plastic

Answer

Wood

Question 4

Which material is used to protect electrical wires from electric current?

Accepted Answer

Plastic

Answer

Copper

Answer

Silver

Answer

Salt water

Question 5

Which material is a good conductor of electricity?

Accepted Answer

Copper

Answer

Rubber

Answer

Wood

Answer

Plastic

Question 6

In an electrical circuit, what unit is used to measure electric current?

Accepted Answer

Ampere (A)

Answer

Volt (V)

Answer

Ohm (Ω)

Answer

Coulomb (C)

Question 7

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

Accepted Answer

Fossil fuels (e.g., coal, natural gas, oil)

Answer

Solar panels

Answer

Batteries

Answer

Wind turbines

Question 8

Which unit is NOT commonly used to measure electric current?

Accepted Answer

Coulomb (C)

Answer

Ampere (A)

Answer

Milliampere (mA)

Answer

Microampere (μA)

Question 9

Which factor does NOT affect the electrical resistance of a conductor?

Accepted Answer

Thickness of the insulation surrounding the conductor

Answer

Length of the conductor

Answer

Cross-sectional area of the conductor

Answer

Material composition of the conductor

Question 10

In a series circuit, what happens to the total resistance when more resistors are added?

Accepted Answer

Increases

Answer

Decreases

Answer

Stays the same

Answer

Becomes zero

Question 11

In a circuit with a battery, switch, resistor, and ammeter, what action will make the ammeter reading increase?

Accepted Answer

Close the switch

Answer

Increase the resistor's resistance

Answer

Decrease the battery's voltage

Answer

Add another resistor to the circuit

Question 12

Which of the following factors does NOT affect the resistance of a conductor?

Accepted Answer

Shape of the conductor

Answer

Length of the conductor

Answer

Cross-sectional area of the conductor

Answer

Temperature of the conductor

Question 13

Which material is the best conductor of electricity for use in electrical wiring?

Accepted Answer

Copper

Answer

Plastic

Answer

Wood

Question 14

Which material is renowned for its exceptional ability to conduct electricity, making it indispensable in electrical wiring and electronic devices?

Accepted Answer

Copper

Answer

Aluminum

Answer

Plastic

Answer

Wood

Question 15

Identify the circuit diagram that depicts a series circuit.

Accepted Answer

Circuit with two batteries and two light bulbs connected in series

Answer

Circuit with two batteries and two light bulbs connected in parallel

Answer

Circuit with two batteries and two light bulbs connected in a combination of series and parallel

Answer

Circuit with two batteries and two light bulbs connected in a closed loop

Question 16

How does the strength of the magnetic field around a magnet change as you move farther away from the magnet?

Accepted Answer

It gets weaker.

Answer

It gets stronger.

Answer

It stays the same.

Answer

It changes direction.

Question 17

Which material is NOT a good conductor of electricity?

Accepted Answer

Rubber

Answer

Copper

Answer

Silver

Answer

Aluminum

Question 18

When an electric current flows through a wire, what is the direction of the magnetic field created around the wire?

Accepted Answer

Perpendicular to the wire's length

Answer

Parallel to the wire's length

Answer

In the same direction as the current

Answer

Opposite to the direction of the current

Question 19

Which factor does NOT influence the resistance of a wire?

Accepted Answer

Colour of the wire

Answer

Length of the wire

Answer

Thickness of the wire

Answer

Material of the wire

Question 20

In a circuit with a battery, resistor, and ammeter, what happens to the current when the resistance increases?

Accepted Answer

Current decreases.

Answer

Current increases.

Answer

Current stays the same.

Question 21

In a series circuit, how does the voltage across each component relate to the voltage across the entire circuit?

Accepted Answer

The voltage across each component is the same as the voltage across the entire circuit.

Answer

The voltage across each component is always higher than the voltage across the entire circuit.

Answer

The voltage across each component is always lower than the voltage across the entire circuit.

Question 22

In a series circuit, what happens to the total resistance as more resistors are added?

Accepted Answer

Increases in proportion to the number of resistors added

Answer

Decreases in proportion to the number of resistors added

Answer

Remains unchanged regardless of the number of resistors added

Answer

Decreases in inverse proportion to the number of resistors added

Question 23

Which of the following does NOT influence the resistance of a conductor?

Accepted Answer

Voltage applied to the conductor

Answer

Length of the conductor

Answer

Cross-sectional area of the conductor

Answer

Material of the conductor

Question 24

When a resistor is connected to a battery, what happens to the current in the circuit if the resistance of the resistor increases?

Accepted Answer

The current decreases.

Answer

The current increases.

Answer

The current remains the same.

Answer

The current changes direction.

Question 25

You add more light bulbs to a series circuit. What happens to the electrical current?

Accepted Answer

Decreases

Answer

Stays the same

Answer

Increases

Answer

Not affected

Question 26

When you connect a battery to a simple circuit, what happens to the electric current?

Accepted Answer

It starts flowing right away.

Answer

It slowly gets stronger over time.

Answer

It only flows when you turn on the switch.

Question 27

In an electrical circuit, the power (P) is related to the voltage (V) and current (I) by which equation?

Accepted Answer

P = V * I

Answer

P = V + I

Answer

P = V / I

Question 28

What causes the magnetic field that forms around a wire when an electric current flows through it?

Accepted Answer

Magnetic induction

Answer

Electrostatic induction

Answer

Piezoelectricity

Answer

Thermoelectricity

Question 29

Which of the following factors does NOT affect the resistance of a wire at room temperature?

Accepted Answer

Temperature

Answer

Length

Answer

Cross-sectional area

Answer

Material type

Question 30

What is the unit of electrical resistance?

Accepted Answer

Ohm (Ω)

Answer

Ampere (A)

Answer

Volt (V)

Answer

Coulomb (C)

Question 31

How is electricity used to transmit data and information?

Accepted Answer

Electricity carries data as electromagnetic waves.

Answer

Electricity encodes data directly in its voltage levels.

Answer

Electricity serves as a physical medium for data transmission.

Answer

Electricity cannot be used for data transmission.

Question 32

In a circuit with a single battery, what happens to the voltage when another battery is added in series?

Accepted Answer

Increases

Answer

Decreases

Answer

Remains the same

Question 33

Which of the following was a key development in the history of electrical engineering that significantly contributed to the advancement of modern electrical systems and devices?

Accepted Answer

Michael Faraday's discovery of electromagnetism

Answer

The invention of the steam engine

Question 34

In a series circuit, the total resistance is:

Accepted Answer

Equal to the sum of the resistances of all components

Answer

Less than the resistance of any individual component

Answer

Greater than the resistance of any individual component

Answer

Unrelated to the resistances of the individual components

Question 35

What is the fundamental difference between an electron and a proton?

Accepted Answer

Electrons are negatively charged, while protons are positively charged.

Answer

Electrons are positively charged, while protons are negatively charged.

Answer

Electrons are larger than protons.

Answer

Protons are larger than electrons.

Question 36

Why is it important to earth electrical appliances?

Accepted Answer

To prevent electric shocks

Answer

To improve appliance performance

Answer

To reduce power consumption

Answer

To enhance the appearance of appliances

Question 37

Which of the following materials is a good conductor of electricity?

Accepted Answer

Copper

Answer

Plastic

Answer

Wood

Answer

Rubber

Question 38

Transformers are essential in electricity transmission and distribution. Which option does NOT represent a fundamental principle of transformer operation?

Accepted Answer

Transformers conserve electrical energy.

Answer

Transformers utilize electromagnetic induction.

Answer

Magnetic coupling is vital for energy transfer in transformers.

Question 39

Which of the following materials conducts electricity well?

Accepted Answer

Copper

Answer

Plastic

Answer

Rubber

Answer

Wood

Question 40

What is the unit of measurement for electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 41

Which circuit type allows current to take multiple paths?

Accepted Answer

Parallel circuit

Answer

Series circuit

Answer

Mixed circuit

Answer

Open circuit

Question 42

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

Accepted Answer

To protect against excessive current

Answer

To regulate current flow

Answer

To isolate faulty components

Answer

To improve power efficiency

Question 43

Which device converts electrical energy into mechanical energy?

Accepted Answer

Motor

Answer

Battery

Answer

Generator

Answer

Transformer

Question 44

What is the international unit of measurement for electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Coulomb

Question 45

Which of these materials is a conductor of electricity?

Accepted Answer

Copper

Answer

Plastic

Answer

Wood

Answer

Rubber

Question 46

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

Accepted Answer

To protect the circuit from excessive current

Answer

To regulate the flow of current in the circuit

Answer

To store electrical energy

Answer

To increase the voltage in the circuit

Question 47

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

Accepted Answer

Diode

Answer

Resistor

Answer

Capacitor

Answer

Transistor

Question 48

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

Accepted Answer

To change the voltage of the current

Answer

To isolate circuits from each other

Answer

To protect against overcurrent

Answer

To store electrical energy

Question 49

Which material allows electricity to flow through it with ease?

Accepted Answer

Copper

Answer

Rubber

Answer

Plastic

Answer

Wood

Question 50

What is the unit of measurement for electric current typically used in circuits?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 51

Which of the following is NOT a type of electrical circuit configuration?

Accepted Answer

Open circuit

Answer

Series circuit

Answer

Parallel circuit

Answer

Mixed circuit

Question 52

According to Ohm's law, what is the mathematical relationship between voltage (V), current (I), and resistance (R)?

Accepted Answer

V = IR

Answer

I = VR

Answer

R = VI

Answer

V = I/R

Question 53

Which electrical device transforms electrical energy into mechanical energy?

Accepted Answer

Motor

Answer

Battery

Answer

Resistor

Answer

Capacitor

Question 54

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

Accepted Answer

To protect the circuit from excessive current

Answer

To increase the flow of current

Answer

To store electrical energy

Answer

To regulate voltage

Question 55

Which particle has a positive charge?

Accepted Answer

Proton

Answer

Electron

Answer

Neutron

Answer

Nucleus

Question 56

What is the standard unit of measurement for electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 57

Which of the following materials is known for its ability to conduct electricity well?

Accepted Answer

Metal

Answer

Plastic

Answer

Wood

Answer

Rubber

Question 58

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

Accepted Answer

To prevent excessive current flow

Answer

To regulate the flow of current

Answer

To store electrical energy

Answer

To switch the circuit on and off

Question 59

Which of the Ohm's law equations represents the relationship between voltage (V), current (I), and resistance (R)?

Accepted Answer

V = IR

Answer

I = VR

Answer

R = VI

Answer

V = I / R

Question 60

Which electricity generation method is most environmentally friendly and efficient?

Accepted Answer

Renewable energy sources

Answer

Fossil fuels

Answer

Nuclear power

Answer

Biomass

Question 61

When working with high-voltage electrical systems, which safety precaution is crucial?

Accepted Answer

Wear insulated rubber gloves

Answer

Touch exposed wires

Answer

Work alone without supervision

Question 62

Which unit is used to measure electric charge in the International System of Units (SI)?

Accepted Answer

Coulomb

Answer

Volt

Answer

Ampere

Answer

Ohm

Question 63

What is the primary purpose of grounding in electrical systems?

Accepted Answer

Provide a safe path for excess current to return to the source

Answer

Increase the voltage of an electrical circuit

Answer

Store electrical energy for later use

Answer

Isolate an electrical circuit from other components

Question 64

Which unit in the International System of Units (SI) measures electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Farad