Electromagnetism

Increasing the size of the loops in an electromagnet will _________ the strength.

• decrease

• increase

• not affect

Tags

NGSS.MS-PS2-3

Using a weaker magnet in an electromagnet will _________ the strength.

• decrease

• increase

• not affect

Tags

NGSS.MS-PS2-3

This is a picture of a simple electromagnet. How could the electromagnet be made stronger?

• Add more coils of wire to the nail.

• Use a smaller battery.

• Reverse the poles of the magnet.

• Remove all the coils and the nail.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Electricity is different from static electricity because electricity...

• is the build-up of charges.

• means the flow of electrons.

• is safer.

• only involves protons.

What is true about electricity and magnetic fields?

• Electricity is always needed to create any magnet.

• Magnetism can transform energy into electricity.

• Electricity is stronger than a magnetic field.

• Electricity prevents magnetic fields from occurring.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

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

• It increases.

• It doesn't change.

• It decreases.

Tags

NGSS.MS-PS2-3

If a substance has more electrons than protons on its surface, what type of charge does it have?

• A positive charge.

• A negative charge.

• A neutral charge

Tags

NGSS.MS-PS2-3

An object becomes positively charged when which of the following occurs to it?

• loses electrons

• gains electrons

• loses protons

• gains neutrons

Tags

NGSS.MS-PS2-5

Current is on the x-axis. Magnetic strength is on the y-axis. What conclusion can you draw from this graph?

• As current increases, magnetic strength decreases.

• As current increases, magnetic strength increases.

• As current decreases, magnetic strength increases.

• There is no relationship between current and magnetic strength.

Which of these use(s) electromagnets?

• speakers and headphones

• doorbells

• cassette tapes

• all of the above

Tags

NGSS.MS-PS2-3