Electromagnetism Test Review

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Magnetic poles that are alike

• attract each other.
• repel each other.
• do not interact.
• have the same shape.

Why is the earth magnetic? Check all that apply.

• The movement of the liquid core.
• It is not magnetic.
• There is a huge bar magnet inside the earth.
• Core is made of mostly Iron and Nickle
• Because of static electricity.

An electric current produces a(n)

• magnetic field
• magnet
• solenoid
• transfer of electrons

The region around a magnet where the magnetic force is exerted is known as its

• magnetic pole.
• magnetic domain.
• magnetic field.
• electrical field.

True or False: To turn an electromagnet off you simply turn the current off by disconnecting the battery or lift the switch up breaking the circuit.

• True
• False

Magnetism and Electricity are what type of forces?

• Frictional forces.
• Contact forces.
• Gravitational forces.
• Non-contact forces.

Select all of the following statements that are TRUE.

• Protons have a positive charge and cannot be transferred from one object to another
• Electrons have a positive charge and cannot be transferred from one object to another
• Electrons have a negative charge and can be transferred from one object to another
• Neutrons have no charge and can be transferred from one object to another

A north magnetic pole brought near a south magnetic pole

• nullifies (cancels out) the south pole.
• attracts the south pole.
• repels the south pole.
• magnetizes the south pole.

True or False. The area between the poles (the middle) of a single bar magnet has the strongest magnetic effect.

• True
• False