What is the purpose of a diode?

It only lets the current flow in one direction

What does carbon neutral mean?

When a plant grows, it takes in $$CO_2$$ and releases the same amount of $$CO_2$$ when it is burnt so there is no overall effect on climate change

When the plant is growing it gives out $$CO_2$$

When a plant is burnt it takes in $$CO_2$$

When a plant grows, it gives out $$CO_2$$ and takes in the same amount of $$CO_2$$ when it is burnt so there is no overall effect on climate change

How is the National Grid made more efficient?

Step-up transformer increases voltage to decrease current so less energy is lost as heat in the cables

Step-up transformer decreases voltage to increase current so less energy is lost as heat in the cables

Step-down transformer increases voltage to decrease current so less energy is lost as heat in the cables

Step-up transformer increases voltage to decrease current so more energy is lost as heat in the cables

How is the National Grid made safer?

The step-down transformer decreases the voltage so it is safer for consumers

The step-up transformer decreases the voltage so it is safer for consumers

The step-down transformer decreases the current so it is safer for consumers

The step-down transformer increases the voltage so it is safer for consumers

Describe the National Grid

The network of pylons, cables and transformers that transports electricity from power stations to consumers

The network of pylons, cables and transformers that transports sausages from power stations to consumers

The network of pylons, cables and transformers that transports electricity from consumers to power stations

The network of pylons and cables that transports electricity from power stations to transformers

Why do convection currents occur in a liquid?

Hot liquid rises because it is less dense and lighter

Hot liquid rises because it is more dense and lighter

Hot liquid rises because it is more dense and heavier

Hot liquid rises because it is less dense and heavier

Conduction and convection both need particles to transfer heat energy, why doesn't radiation need particles?

It transfers heat using an electromagnetic wave

It transfers heat using electrons

there are no particles in a vacuum

Why would hot cup of tea cool down quicker in a black cup compared to a white cup?

Black surfaces are good emitters of heat radiation

Black surfaces are poor emitters of heat radiation

Black surfaces are good absorbers of heat radiation

Black surfaces are poor absorbers of heat radiation

Why does the water in the black can heat up quicker?

Black surfaces are good absorbers of heat radiation

Black surfaces are poor absorbers of heat radiation

Black surfaces are good emitters of heat radiation

Black surfaces are poor emitters of heat radiation

Constantly changes direction and changes value (size)

Constantly changes direction but has the same value (size)

Constantly changes value (size) but has the same direction

Current flows in one direction and has a constant value

Constantly changes direction but has the same value (size)

Constantly changes direction and changes value (size)

Constantly changes value (size) but has the same direction

What are the advantages of an mcb over a fuse?

can be reset and takes longer to act

can't be reset but faster acting

What is a transverse wave?

vibrations are perpendicular to the direction of the wave

vibrations are parallel to the direction of the wave

vibrations are parallel to the direction of the particles

vibrations are perpendicular to the direction of the particles

What is a longitudinal wave?

vibrations are parallel to the direction of the wave

vibrations are parallel to the direction of the particles

vibrations are perpendicular to the direction of the wave

vibrations are perpendicular to the direction of the particles

Which of these statements shows the properties that all electromagnetic waves have in common?

they are all transverse waves and they all travel at the same speed in a vacuum

they are all longitudinal waves and all transfer energy

They all transfer energy but travel at different speeds

they all travel at the same speed but some are transverse waves and some are longitudinal waves

Which parts of the spectrum are ionising?

Radiowaves, microwaves and infra-red

How does a geostationary satellite stay above the same point on the Earth?

Takes 24 hours to orbit the earth and it orbits the equator

Takes 24 hours to orbit the earth and it orbits the poles

Takes 12 hours to orbit the earth and it orbits the poles

Takes 12 hours to orbit the earth and it orbits the equator

Which description best describes a geosynchronous satellite?

Takes 24 hours to orbit the Earth but it only passes the same point once in 24 hrs

Takes 24 hours to orbit the Earth and it orbits the equator

Takes 24 hours to orbit the Earth and it stays above the same point on the Earth

Takes 12 hours to orbit the earth and it orbits the equator

Year 10 Physics Revision - Unit 3

Authored by Lynsey Story

Physics

10th Grade

Used 16+ times

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63 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is an LDR?

Light dependent resistor

Light dimming resistor

Light dark reader

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of a variable resistor?

To allow you to get a series of readings for power and voltage

To allow you to get a series of readings for current and voltage

To change the circuit

To measure the resistance

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which symbol is a fuse?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which symbol is a resistor?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which symbol is an LDR?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which symbol is an thermistor?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which symbol is an variable resistor?

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Year 10 Physics Revision - Unit 3

What is an LDR?

What is the purpose of a variable resistor?

Which symbol is a fuse?

Which symbol is a resistor?

Which symbol is an LDR?

Which symbol is an thermistor?

Which symbol is an variable resistor?

Which is the graph for a bulb?

Which is the graph for a wire (or a resistor at constant temperature)?

Which is the graph for a thermistor?

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