Magnets & Electromagnets

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Test your magnetism knowledge

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Aaliah Karolia

Sudáfrica

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Froggy Jumps Magnets & ElectromagnetsVersión en línea Test your magnetism knowledge por Aaliah Karolia 1 What does an electromagnet need to work? a Water b Electricity c Sunlight 2 How can an electromagnet be made stronger? a Use thicker insulation only b Use a non-magnetic core c Increase current and/or number of turns 3 Which material is strongly attracted by magnets? a Plastic b Ferromagnetic materials like iron c Glass 4 Outside a magnet, magnetic field lines run from which pole to which? a In circles around the magnet b From south to north c From north to south 5 If you increase the current in an electromagnet, what happens to its field? a The field reverses direction automatically b The magnetic field becomes stronger c The field becomes weaker 6 What device uses electromagnets to move heavy metal objects? a Solar panel b Transformer c Crane (electromagnetic crane) 7 Which factor does NOT affect electromagnet strength? a Number of turns b Color of the wire c Current 8 What shows the area around a magnet where its force acts? a Electromagnet b Electric circuit c Magnetic field 9 True or false: Like poles repel and opposite poles attract. a True b Only at high temperatures c False 10 Why are electromagnets useful in machines like cranes at scrap yards? a They are colourful b They can be turned on and off c They are permanent magnets

Froggy Jumps

Magnets & ElectromagnetsVersión en línea

Test your magnetism knowledge

por Aaliah Karolia

What does an electromagnet need to work?

Water

Electricity

Sunlight

How can an electromagnet be made stronger?

Use thicker insulation only

Use a non-magnetic core

Increase current and/or number of turns

Which material is strongly attracted by magnets?

Plastic

Ferromagnetic materials like iron

Glass

Outside a magnet, magnetic field lines run from which pole to which?

In circles around the magnet

From south to north

From north to south

If you increase the current in an electromagnet, what happens to its field?

The field reverses direction automatically

The magnetic field becomes stronger

The field becomes weaker

What device uses electromagnets to move heavy metal objects?

Solar panel

Transformer

Crane (electromagnetic crane)

Which factor does NOT affect electromagnet strength?

Number of turns

Color of the wire

Current

What shows the area around a magnet where its force acts?

Electromagnet

Electric circuit

Magnetic field

True or false: Like poles repel and opposite poles attract.

True

Only at high temperatures

False

Why are electromagnets useful in machines like cranes at scrap yards?

They are colourful

They can be turned on and off

They are permanent magnets

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Magnets & Electromagnets

Froggy Jumps

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Froggy Jumps

Magnets & ElectromagnetsVersión en línea

por Aaliah Karolia

What does an electromagnet need to work?

How can an electromagnet be made stronger?

Which material is strongly attracted by magnets?

Outside a magnet, magnetic field lines run from which pole to which?

If you increase the current in an electromagnet, what happens to its field?

What device uses electromagnets to move heavy metal objects?

Which factor does NOT affect electromagnet strength?

What shows the area around a magnet where its force acts?

True or false: Like poles repel and opposite poles attract.

Why are electromagnets useful in machines like cranes at scrap yards?

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