WJEC GCSE Electronics electronic systems and sub-systems quiz quiz

Output, process, input

Input, process, output

Process, input, output

Input, output, process

The direction the signal flows

The size of each component

The current in amperes

The order the parts were built

A light-dependent resistor (LDR)

A loudspeaker

A motor

A filament lamp

A thermistor

A microphone

A buzzer

An LDR

It detects a physical change

It produces light or sound

It supplies power to the circuit

It decides what to do with the input signal

To slow the signal down

Because the logic output cannot supply enough current for the motor

To change the supply voltage to AC

To store the signal until later

A thermistor

A reed switch

A loudspeaker

A solenoid

Light

Sound

Magnetic field

Moisture

LDR, thermistor, microphone

Lamp, buzzer, motor

Relay, solenoid, LED

Logic gate, comparator, timer

It removes the need for a power supply

Each block can be built, tested and fault-found on its own

It makes every circuit use less current

It means no calculations are needed

To increase their resistance

To convert AC into DC

To turn the change in resistance into a change in voltage

To store charge

A useful physical effect such as light, sound or movement

A change in resistance

A reference voltage

A logic signal only

A loudspeaker

A comparator or switching circuit

An LDR

A battery

Both convert electrical energy into physical effects

Both convert physical changes into electrical signals

Output transducers sense physical changes

Input transducers convert physical changes into electrical signals; output transducers do the reverse