Electromagnets And Magnetism

How can the strength of an electromagnet be increased? (mark all that apply)

• increase the current flowing through the coil

• increase the number of coils

• add an amplifier to it

• put iron core inside the coil

In order for an electromagnet to be formed, an __________ current must pass through a coil of __________ wrapped around an ________ core.

• wire, iron, electric
• electric, wire, iron
• iron, electric, wire
• excited, hair, apple

What is the role of the battery in the electromagnet?

• It provides light energy for the electromagnet.

• It provides magnetic field for the electromagnet.

• It provides sound energy for the electromagnet.

• It provides the power source for the electromagnet.

Drag the terms to the correct area on the image:

a

b

c

d

Iron Core

Wire

Battery

Magnetic Field

Compasses work when the pointer points to the ___.

• north

• south

• east

• west

In both Magnetism and Electricity, opposite charges or poles

• Attract

• Repel

In both Magnetism and Electricity, like charges or poles

• Attract

• Repel

An electrically charged object has a charge __________ positive or negative.

• Balanced

• Unbalanced

If a magnet is near a compass, where will the magnet point?

• Towards the Earth's North Pole

• Towards the compass

• Away from the compass

• Away from the Earth's North Pole

If two magnets create a balanced field, where will the compass point?

• Towards the North Pole of the Earth

• Towards the South Pole of the Earth

• Towards the first magnet

• Towards the second magnet