Eduqas GCSE Design and Technology technical systems and mechanisms overview quiz quiz

Wind

Coal

Natural gas

Nuclear

They release a great deal of carbon dioxide and harmful smoke while they are generating electricity

They are intermittent, generating only when the wind blows or the sun shines

They use a finite fuel that runs out and must be mined or drilled like coal

They produce radioactive waste that must be stored safely for many years

It is thrown away after a single use, which keeps the drill far cheaper to run than any rechargeable battery option ever would be

It produces no current at all, so the drill relies entirely on being plugged into the mains while in use

It can be recharged and reused many times, so it is cheaper over time and less wasteful for a frequently used tool

It cannot be recycled, which makes it the most environmentally friendly choice for a hand tool of this kind

It produces the final effect, such as turning on a lamp or sounding a buzzer

It decides what the system should do by processing the signal it receives

It stores the program that the system follows while it is running

It senses a condition, such as light or temperature

Light; resistance is low in bright light and high in the dark

Temperature; its resistance falls steadily as the surroundings get warmer

Sound; its resistance rises whenever the volume around it gets louder

Pressure; its resistance falls sharply whenever it is squeezed or pressed

It senses the light level and steadily changes its own resistance as the brightness around it changes

It acts as an electronic switch, using a small current to switch a much larger one

It produces sound by turning an electrical signal into vibrations in the air

It stores energy and releases it slowly to smooth out the supply to the circuit

To make it shine far more brightly than it otherwise would on its own

To change its colour from red to a cooler shade such as green or blue

To limit the current so it does not draw too much and burn out

To let it sense the surrounding light and switch itself off in daylight

Continuous rotary

Oscillating arc swing

Linear one-way slide

Reciprocating

The load

The pivot

The effort

Nothing

1:3

3:1

24:72

1:1

1:3

40:120 with no change

3:1

2:1

Speeds up the rotation so the output shaft turns faster than the input shaft

Reverses the direction of rotation only, leaving the speed completely unchanged

Stores rotational energy and releases it later, acting like a heavy flywheel

Converts rotary motion into reciprocating or oscillating motion