Electromagnets and Generators Foldable

A type of magnet that has temporary magnetic effect when electric current flows through it.

This refer to

• Electric

• Electronic

• Electrostatic

• Electromagnet

What is an electromagnet?

• a temporary magnet made from current carrying wire around a magnetic metal core.
• a permanent magnet with a north and south pole

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This is a picture of a simple electromagnet. How can 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.

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Which of the following is NOT part of an electromagnet?

• Wire or solenoid

• Ferromagnetic (iron) core

• Toothpick
• Power source/Battery

While electric current is flowing through a wire, what surrounds the wire?

• a magnetic field
• a glowing light
• neutrons
• protons

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What would increase the strength of an electromagnet?

• Increasing the amount of current flowing through the wire.
• Inserting a wooden core inside the coil
• Changing the direction of the current
• Decreasing the number of coils of wire

This is an object made from a battery, a nail and some wire. What will happen if you touch a metal paper clip to the nail?

• The wires will melt.

• The battery will spark.

• The nail will give you a shock.

• The paper clip will stick to the nail.

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A compass needle responds to a magnetic field, because the compass needle is a

• A. generator.
• B. motor.   
• C. magnet.
• D. transformer.

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What must the student do in the picture, in order to induce electricity and move the the galvonometer

• nothing

• move the magnet

• add more loops of wire

• unplug the galvnonmeter

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What type of particle is a Electron ?

• Positive

• Negative

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