Electrical Systems Quizzes for Year 11 Design and Technology

Question 1

Which component is NOT essential for an electrical circuit?

Accepted Answer

Insulator

Answer

Power source

Answer

Conductor

Answer

Load

Question 2

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

Accepted Answer

To protect the circuit from excessive current

Answer

To allow unrestricted current flow

Answer

To store electrical energy

Answer

To control voltage

Question 3

Which material exhibits good electrical conductivity?

Accepted Answer

Copper

Answer

Plastic

Answer

Wood

Answer

Rubber

Question 4

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

Accepted Answer

To alter voltage levels

Answer

To convert AC to DC current

Answer

To store electrical charge

Answer

To protect circuits from overloads

Question 5

What is a relay's primary function in an electrical control system?

Accepted Answer

Circuit switching

Answer

Signal amplification

Answer

Motor speed control

Answer

Data storage

Question 6

What unit is used to measure electrical current?

Accepted Answer

Amperes

Answer

Volts

Answer

Ohms

Answer

Watts

Question 7

In a parallel circuit, how does current flow?

Accepted Answer

Current is divided among multiple paths.

Answer

Current flows through only one path.

Answer

Current flows in a single direction.

Answer

Current is blocked from flowing.

Question 8

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

Accepted Answer

Control the flow of current

Answer

Store electrical energy

Answer

Generate electrical energy

Answer

Insulate the circuit

Question 9

Identify an example of an electromagnetic device.

Accepted Answer

Electric motor

Answer

Battery

Answer

Resistor

Answer

Capacitor

Question 10

What is the primary purpose of a control system in an electrical system?

Accepted Answer

Regulate the system's output

Answer

Store electrical energy

Answer

Generate electrical energy

Answer

Protect the system from damage

Question 11

Which of the following materials conducts electricity?

Accepted Answer

Metal

Answer

Plastic

Answer

Glass

Answer

Rubber

Question 12

Which of the following best describes the types of electrical circuits?

Accepted Answer

Both series and parallel

Answer

Series

Answer

Parallel

Answer

Mixed

Question 13

Which principle explains the operation of a transformer?

Accepted Answer

Electromagnetic induction

Answer

Capacitance

Answer

Ohm's law

Answer

Kirchhoff's laws

Question 14

Which material is commonly used as an electrical insulator?

Accepted Answer

Rubber

Answer

Copper

Answer

Iron

Answer

Aluminium

Question 15

What is the fundamental difference between AC and DC current?

Accepted Answer

AC current changes direction, while DC current flows in one direction.

Answer

AC current has higher voltage than DC current.

Answer

DC current is more efficient than AC current.

Answer

AC current is used for long-distance transmission, while DC current is used for short-distance transmission.

Question 16

Which of the following is a renewable source of energy?

Accepted Answer

Solar

Answer

Coal

Answer

Natural gas

Answer

Nuclear

Question 17

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

Accepted Answer

Monitor and adjust system performance

Answer

Provide power to the system

Answer

Store energy for the system

Answer

Protect the system from damage

Question 18

Identify the option that is NOT a type of electrical circuit.

Accepted Answer

Open circuit

Answer

Series circuit

Answer

Parallel circuit

Answer

Mixed circuit

Question 19

Which unit is used to measure electrical current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 20

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

Accepted Answer

To decrease current flow

Answer

To increase current flow

Answer

To enhance energy storage

Answer

To convert electrical energy into light

Question 21

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

Accepted Answer

To adjust voltage levels

Answer

To decrease current flow

Answer

To change the frequency of AC current

Answer

To isolate electrical circuits

Question 22

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

Accepted Answer

To protect the circuit from excessive current

Answer

To provide a path for current flow

Answer

To enhance energy storage

Answer

To convert electrical energy into heat

Question 23

Which formula is used to calculate the power dissipated by a resistor?

Accepted Answer

P = I^2R

Answer

P = VI

Answer

P = IV

Answer

P = V^2/R

Question 24

In a series circuit, what property remains constant throughout the circuit?

Accepted Answer

Current

Answer

Voltage

Answer

Resistance

Answer

Power

Question 25

Which component protects an electrical circuit from overcurrent conditions?

Accepted Answer

Fuse

Answer

Resistor

Answer

Capacitor

Answer

Inductor

Question 26

Which type of electrical component converts electrical energy into mechanical motion?

Accepted Answer

Motor

Answer

Resistor

Answer

Capacitor

Answer

Inductor

Question 27

What is the standard unit of measure for electrical current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 28

Which equation correctly describes the relationship between electrical power (P), voltage (V), and current (I)?

Accepted Answer

P = V x I

Answer

P = V / I

Answer

V = P / I

Answer

I = V / P

Question 29

In a series circuit, how does the current change when more resistors are added?

Accepted Answer

Decreases

Answer

Increases

Answer

Stays the same

Question 30

What is the standard unit of measurement for electrical current?

Accepted Answer

Ampere (A)

Answer

Ohm (Ω)

Answer

Volt (V)

Answer

Watt (W)

Question 31

Which type of resistor allows for adjustable resistance in a circuit?

Accepted Answer

Potentiometer

Answer

LDR (Light-Dependent Resistor)

Answer

Thermistor

Answer

Fixed resistor

Question 32

What is a primary function of a transistor in an electrical circuit?

Accepted Answer

Amplification and switching

Answer

Current regulation

Answer

Voltage regulation

Answer

Energy storage

Question 33

Which of the following is a type of AC (Alternating Current) motor?

Accepted Answer

Induction motor

Answer

Servo motor

Answer

DC (Direct Current) motor

Answer

Stepper motor

Question 34

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

Accepted Answer

Voltage conversion

Answer

Energy storage

Answer

Signal amplification

Answer

Current conversion

Question 35

Which of the following is a crucial safety device used in electrical systems to prevent overcurrent?

Accepted Answer

Circuit breaker

Answer

Transistor

Answer

Resistor

Answer

Capacitor

Question 36

What is the primary role of a microcontroller in an electronic system?

Accepted Answer

Control and computation

Answer

Signal amplification

Answer

Signal processing

Answer

Energy conversion

Question 37

Which of the following is a characteristic of a digital signal?

Accepted Answer

Binary representation

Answer

Analog data

Answer

Square waveform

Answer

Sinusoidal pattern

Question 38

What is the main function of a printed circuit board (PCB) in an electrical system?

Accepted Answer

Providing a physical platform for electronic components

Answer

Storing electrical energy

Answer

Amplifying electrical signals

Question 39

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

Accepted Answer

To limit the flow of current

Answer

To increase the voltage in the circuit

Answer

To store electrical energy

Answer

To control the direction of current flow

Question 40

Which of the following is a type of electrical control system?

Accepted Answer

Feedback control system

Answer

Hydraulic control system

Answer

Pneumatic control system

Answer

Mechanical control system

Question 41

What is the key difference between a fuse and a circuit breaker?

Accepted Answer

A fuse is a one-time use device, while a circuit breaker can be reset after tripping.

Answer

A circuit breaker is more expensive than a fuse.

Answer

A fuse is rated for higher currents than a circuit breaker.

Question 42

What is the primary function of a transformer?

Accepted Answer

To convert AC voltage from one level to another

Answer

To control the direction of current flow

Answer

To store electrical energy

Answer

To limit the flow of current

Question 43

Which of the following is an advantage of using a star connection in a three-phase electrical system?

Accepted Answer

It provides a neutral point

Answer

It is more efficient than a delta connection

Answer

It has a higher power factor than a delta connection

Question 44

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

Accepted Answer

To store electrical energy

Answer

To increase the voltage in the circuit

Answer

To control the direction of current flow

Answer

To limit the flow of current

Question 45

Which of the following is a type of electrical machine that converts mechanical energy into electrical energy?

Accepted Answer

Generator

Answer

Pump

Answer

Engine

Answer

Compressor

Question 46

What is the main purpose of an Electrical Installation Condition Report (EICR)?

Accepted Answer

To assess the safety and condition of electrical installations

Answer

To design new electrical installations

Answer

To repair faulty electrical installations