Electronics Learning Quizzes for Year 11 Design and Technology

Question 1

What is the role of an inductor in an electrical circuit? Describe its characteristics and practical uses.

Accepted Answer

An inductor stores energy in a magnetic field and resists changes in current, making it useful for smoothing out fluctuations in current or voltage.

Answer

An inductor limits the flow of current in a circuit, acting as a resistor.

Answer

An inductor stores energy in an electric field, similar to a capacitor.

Answer

An inductor allows current to flow in only one direction, like a semiconductor.

Question 2

Can transistors function as amplifiers?

Accepted Answer

Yes, with appropriate biasing.

Answer

Yes, without the need for external biasing components.

Answer

No, they are only used in switching circuits.

Question 3

Sensors and transducers play a crucial role in electronic systems. Explain how they work and provide examples of their applications.

Accepted Answer

Sensors convert physical quantities like temperature or motion into electrical signals. Transducers convert electrical signals into physical quantities like sound or light.

Answer

Sensors convert electrical signals into physical quantities. For example, loudspeakers convert electrical signals into sound waves.

Answer

Sensors and transducers are only used in analog electronic systems.

Answer

Sensors and transducers are not essential components in electronic systems.

Question 4

Define electrical potential and explain its significance in electrical circuits.

Accepted Answer

Electrical potential is the energy required to move a unit charge between two points in an electric field.

Answer

Electrical potential is the difference in electrical charge between two points.

Answer

Electrical potential is the force exerted by an electric field on a charged particle.

Question 5

Which of the following is **not** a unit of electrical current?

Accepted Answer

Coulomb

Answer

Ampere

Answer

Milliampere

Answer

Microampere

Question 6

According to Ohm's law, the relationship between voltage (V), current (I), and resistance (R) is expressed by the equation:

Accepted Answer

V = IR

Answer

I = VR

Answer

R = VI

Answer

V = RI

Question 7

What is the primary function of a capacitor in an alternating current (AC) circuit?

Accepted Answer

To store electrical energy

Answer

To block direct current (DC)

Answer

To amplify signals

Answer

To reduce noise

Question 8

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

Accepted Answer

Low electrical conductivity at room temperature

Answer

High electrical conductivity at all temperatures

Answer

Insulating properties

Answer

Magnetic properties

Question 9

What is the key difference between a bipolar junction transistor (BJT) and a field-effect transistor (FET)?

Accepted Answer

BJTs are current-controlled devices, while FETs are voltage-controlled devices.

Answer

BJTs have three terminals, while FETs have two terminals.

Answer

BJTs can amplify both current and voltage, while FETs can only amplify voltage.

Answer

FETs are more efficient than BJTs.

Question 10

What is the main function of a voltage regulator in an electronic circuit?

Accepted Answer

To maintain a constant voltage across a load

Answer

To convert alternating current (AC) to direct current (DC)

Answer

To amplify signals

Answer

To protect circuits from overvoltage

Question 11

What is the primary purpose of a breadboard in electronics?

Accepted Answer

To provide a temporary platform for building and experimenting with circuits

Answer

To permanently connect electronic components

Answer

To measure electrical properties

Answer

To store electronic components

Question 12

What is the rate of flow of electric charge called?

Accepted Answer

Electric current

Answer

Voltage

Answer

Resistance

Answer

Power

Question 13

What is the total resistance in a series circuit?

Accepted Answer

Equal to the sum of the individual resistances

Answer

Greater than the sum of the individual resistances

Answer

Less than the sum of the individual resistances

Answer

Independent of the individual resistances

Question 14

Which of the following components is NOT passive?

Accepted Answer

Transistor

Answer

Resistor

Answer

Capacitor

Answer

Diode

Question 15

What is the primary function of a diode?

Accepted Answer

To allow current to flow in one direction only

Answer

To amplify current

Answer

To store electrical energy

Answer

To regulate voltage

Question 16

What is the unit of capacitance?

Accepted Answer

Farad

Answer

Ampere

Answer

Volt

Answer

Ohm

Question 17

Which of the following is NOT a safety precaution when working with electronics?

Accepted Answer

Touch live wires

Answer

Use insulated tools

Answer

Isolate the circuit before working on it

Answer

Wear protective clothing

Question 18

What is the primary purpose of a multimeter?

Accepted Answer

To measure voltage, current, and resistance

Answer

To generate voltage and current

Answer

To amplify signals

Answer

To store electrical energy

Question 19

What is the function of a printed circuit board (PCB)?

Accepted Answer

To connect electronic components

Answer

To amplify signals

Answer

To store electrical energy

Answer

To regulate voltage

Question 20

Which of the following devices is used to change the voltage of an AC signal?

Accepted Answer

Transformer

Answer

Resistor

Answer

Capacitor

Answer

Diode

Question 21

Which of the following is NOT considered a passive electronic component?

Accepted Answer

Transistor

Answer

Resistor

Answer

Capacitor

Answer

Diode

Question 22

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

Accepted Answer

Store electrical energy

Answer

Resist the flow of current

Answer

Amplify signals

Answer

Regulate voltage

Question 23

What is the primary function of a diode?

Accepted Answer

Allow current to flow in only one direction

Answer

Store electrical energy

Answer

Amplify signals

Answer

Regulate voltage

Question 24

Which unit is used to measure electrical resistance?

Accepted Answer

Ohm

Answer

Ampere

Answer

Volt

Answer

Watt

Question 25

What is the main purpose of a circuit diagram?

Accepted Answer

Represent an electrical circuit using symbols and lines

Answer

Provide instructions on how to physically construct a circuit

Answer

Calculate the values of components in a circuit

Answer

Simulate the behavior of a circuit

Question 26

According to Ohm's law, the current (I) flowing through a conductor is directly proportional to the:

Accepted Answer

Voltage (V)

Answer

Resistance (R)

Answer

Power (P)

Answer

Temperature (T)

Question 27

A parallel circuit is characterized by:

Accepted Answer

Components connected on separate branches

Answer

All components connected in a single loop

Answer

A single path for current to flow

Answer

High resistance

Question 28

Identify the device that converts electrical energy into light energy:

Accepted Answer

Light-emitting diode (LED)

Answer

Diode

Answer

Transistor

Answer

Resistor

Question 29

The primary purpose of a capacitor in an electronic circuit is to:

Accepted Answer

Store electrical charge

Answer

Reduce current flow

Answer

Increase voltage

Answer

Block AC signals

Question 30

Which unit is used to measure electrical resistance?

Accepted Answer

Ohm (Ω)

Answer

Ampere (A)

Answer

Volt (V)

Answer

Farad (F)

Question 31

In a series circuit, the total resistance is:

Accepted Answer

Equal to the sum of the individual resistances

Answer

Less than the sum of the individual resistances

Answer

Greater than the sum of the individual resistances

Answer

Dependent on the voltage applied

Question 32

Which of these materials is known as a semiconductor?

Accepted Answer

Silicon

Answer

Aluminum

Answer

Copper

Answer

Steel

Question 33

What is the function of a diode in an electronic circuit?

Accepted Answer

To allow current to flow in only one direction

Answer

To amplify electrical signals

Answer

To store electrical energy

Answer

To regulate voltage

Question 34

Which unit is used to measure capacitance in electronics?

Accepted Answer

Farad

Answer

Henry

Answer

Ohm

Answer

Watt

Question 35

What is the primary use of a transformer in electronic circuits?

Accepted Answer

To change the voltage of an AC signal

Answer

To convert AC signals to DC signals

Answer

To provide isolation between different parts of a circuit

Answer

To amplify electrical signals

Question 36

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

Accepted Answer

To protect components from damage by breaking the circuit when current exceeds a safe level

Answer

To regulate voltage in the circuit

Answer

To store electrical energy

Answer

To improve signal quality

Question 37

What is the primary purpose of a printed circuit board (PCB) in electronics?

Accepted Answer

To provide electrical connections between electronic components

Answer

To store data for the circuit

Answer

To amplify electrical signals

Answer

To isolate different parts of a circuit from each other

Question 38

Which of the following is NOT a fundamental electrical quantity?

Accepted Answer

Frequency

Answer

Current

Answer

Voltage

Answer

Power

Question 39

What is the SI unit of resistance?

Accepted Answer

Ohm

Answer

Ampere

Answer

Volt

Answer

Watt

Question 40

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

Accepted Answer

Copper

Answer

Plastic

Answer

Rubber

Answer

Wood

Question 41

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

Accepted Answer

To decrease current flow

Answer

To increase current flow

Answer

To control voltage

Answer

To store energy

Question 42

What type of device converts alternating current (AC) voltage to direct current (DC) voltage?

Accepted Answer

Rectifier

Answer

Transformer

Answer

Amplifier

Answer

Oscillator

Question 43

Which of the following is an example of a digital signal?

Accepted Answer

Square wave

Answer

Sine wave

Answer

Triangle wave

Answer

Sawtooth wave

Question 44

What is the main purpose of a logic gate in a digital circuit?

Accepted Answer

To perform basic logical operations

Answer

To amplify signals

Answer

To store data

Answer

To generate waveforms

Question 45

What is the SI unit of electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Joule

Question 46

According to Ohm's law, which quantity is directly proportional to the voltage?

Accepted Answer

Current

Answer

Resistance

Answer

Power

Answer

Capacitance

Question 47

Which electronic component is primarily used for controlling the flow of current in a circuit?

Accepted Answer

Resistor

Answer

Diode

Answer

Capacitor

Answer

Inductor

Question 48

What is the main function of a diode?

Accepted Answer

To allow current to flow in only one direction

Answer

To store electrical energy

Answer

To filter out unwanted frequencies

Answer

To amplify electrical signals

Question 49

Which circuit topology connects components in a way that provides multiple paths for current to flow?

Accepted Answer

Parallel

Answer

Series

Answer

Bridge

Answer

Ladder

Question 50

What is the equation used to calculate the voltage drop across a resistor?

Accepted Answer

V = IR

Answer

V = PQ

Answer

I = VR

Answer

P = IV

Question 51

Which device converts alternating current (AC) to direct current (DC)?

Accepted Answer

Rectifier

Answer

Transformer

Answer

Inverter

Answer

Transistor

Question 52

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

Accepted Answer

To store and release electrical energy

Answer

To block the flow of direct current

Answer

To amplify voltage signals

Answer

To reduce electrical noise

Question 53

How do conductors differ from insulators?

Accepted Answer

Conductors allow electric current to flow easily, while insulators do not

Answer

Insulators allow electric current to flow easily, while conductors do not

Answer

Conductors have high resistance, while insulators have low resistance

Answer

Insulators have high resistance, while conductors have low resistance

Question 54

According to Ohm's law, the voltage across a resistor is directly proportional to:

Accepted Answer

Current

Answer

Resistance

Answer

Power

Answer

Capacitance

Question 55

In a series circuit, the total resistance is:

Accepted Answer

The sum of individual resistances

Answer

Less than the sum of individual resistances

Answer

Greater than the sum of individual resistances

Answer

Equal to the largest individual resistance

Question 56

A capacitor primarily serves the function of:

Accepted Answer

Storing electrical charge

Answer

Blocking DC current

Answer

Amplifying signals

Answer

Controlling voltage levels

Question 57

In the International System of Units (SI), what is the unit of electric current?

Accepted Answer

Ampere

Answer

Volt

Answer

Ohm

Answer

Watt

Question 58

In a simple series circuit, the total resistance is:

Accepted Answer

The sum of the individual resistances

Answer

Less than the sum of the individual resistances

Answer

Greater than the sum of the individual resistances

Answer

Independent of the individual resistances

Question 59

Which of these components is primarily used to store electrical energy?

Accepted Answer

Capacitor

Answer

Resistor

Answer

Inductor

Answer

Diode

Question 60

According to Ohm's law, the current flowing through a conductor is:

Accepted Answer

Directly proportional to the voltage and inversely proportional to the resistance

Answer

Inversely proportional to the voltage and directly proportional to the resistance

Answer

Equal to the voltage multiplied by the resistance

Answer

Independent of both voltage and resistance

Question 61

Which of the following is a type of semiconductor material?

Accepted Answer

Silicon

Answer

Copper

Answer

Aluminum

Answer

Gold

Question 62

The primary purpose of a resistor in a circuit is to:

Accepted Answer

Control the flow of current

Answer

Store electrical energy

Answer

Amplify voltage signals

Answer

Generate magnetic fields

Question 63

Which of these is a type of electronic device used to amplify voltage signals?

Accepted Answer

Transistor

Answer

Resistor

Answer

Capacitor

Answer

Diode

Question 64

In the binary number system, which two digits are used?

Accepted Answer

0 and 1

Answer

1 and 2

Answer

0 and 9

Answer

2 and 5