What is magnetic force?

• A force exerted by electrically charged particles

• The attractive and repulsive forces between two poles

• A force exerted by magnets that makes an object become electrically charged

• A force exerted by a magnet only when it physically touches an object

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of the following is not a good conductor?

• Copper

• Silver

• Aluminium

• Plastic

What happens to the strength of a magnetic field as you move away from the magnet?

• The strength of the magnetic field increases.

• The strength of the magnetic field doesn't change.

• The strength of the magnetic field is doubled.

• The strength of the magnetic field decreases.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Particles with opposite charges ____________ and particles with same (or like) charges ____________.

• attract, repel

• repel, repel

• attract, attract

• repel, attract

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

How do you make an electromagnet stronger?

• Add a motor and/or lightbulbs
• Add more light bulbs and/or wire coils
• add more wire coils and/or a switch
• add more wire coils and/or batteries

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NGSS.MS-PS2-3

What happens when an electric current flows through a wire?

• The wire begins to spin.

• Nothing happens.

• A field of gravity is created around the wire.

• A magnetic field is created around the wire.

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NGSS.HS-PS2-5

NGSS.HS-PS3-5

A device that increases or decreases the voltage of alternating current

• A. magnet
• B. magnetic pole
• C. transformer
• D. magnetic force

A device that converts electrical energy into mechanical energy

• A. electromagnet
• B. electromagnetic induction
• C. electric motor
• D. electromagnetism

Tags

NGSS.HS-PS3-3

The needle of a compass points towards the north because...

• the Earth's magnetic south pole is situated near the Geographic North Pole.
• there is a battery inside the compass.
• The Earth attracts the south pole of the needle.
• There is a mass of iron inside the compass.

Select All that apply to hard magnets

• substance which is permanently magnetised

• lose their magnetic properties as soon as they leave a magnetic field

• have weaker magnetic field

• retains magnetic properties permanently, even when not in a magnetic field