Electromagnetism Quiz

Which of the following electromagnets would have the greatest magnetic field?

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An electric circuit is shown here. Why does the compass needle move when the compass is placed near the wire?

• because electric current makes the light bulb give off thermal energy

• because electric current produces magnetic forces

• because the plastic coating on the wires

• because of the light bulb

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When electric currents and magnetic fields interact we call this ________?

• magnetic force

• electromagnetism

• magnetic charge

• electric motors

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By using a battery with a higher voltage, the strength of the electromagnet will increase.

• True

• False

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What happens when a wire is wound into a coil around an iron core in an electromagnet?

• the wire exolodes
• you get electrocuted 
• the magnetic field becomes stronger
• the magnetic field becomes weaker

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What does the direction of the pointing fingers mean in this picture?

• the direction of the voltage

• the rotation of the wire

• the direction of the magnetic field

• the direction of the current

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The picture is an example of an:

• Electric grid

• Electromagnet

• Electric nail

• Electric power cell

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Who was the scientist who discovered that a current carrying wire causes movement in a nearby compass needle?

• Isaac Newton

• Albert Einstein

• Hans Christian Orsted

• Ms. Hudgins

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True or False: It is possible to turn off the magnetic field of an electromagnet.

• True

• False

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When the magnetic compass needle moved and when the spinning coil motor moved, what type of energy did these two objects possess?

• chemical energy

• potential energy

• kinetic energy

• light energy

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