Electromagnetism Quiz

What happens to the strength of a magnetic field in an electromagnet when you increase the number of wire turns?

• The magnetic field strength decreases

• The magnetic field strength increases

• The magnetic field strength remains the same

• The magnetic field becomes unstable

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NGSS.MS-PS2-3

When a wire moves within a magnetic field, what is created?

• static electricity

• nothing is created

• friction

• an electric current

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NGSS.HS-PS2-5

How does the distance between two magnets affect their attractive force?

• The force increases as distance increases

• The force remains constant regardless of distance

• The force decreases as distance increases

• Distance has no effect on magnetic force

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NGSS.MS-PS2-5

What is the primary purpose of an electric motor?

• To convert mechanical energy into electrical energy

• To convert electrical energy into mechanical energy

• To convert chemical energy into electrical energy

• To convert electrical energy into chemical energy

How does increasing the size of an iron core affect an electromagnet's strength?

• It has no effect on the magnetic field

• It decreases the magnetic field strength

• It increases the magnetic field strength

• It cancels out the magnetic field

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the primary purpose of a generator?

• To store electrical energy

• To convert mechanical energy to electrical energy

• To increase magnetic force

• To decrease electrical resistance

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Olivia is experimenting with an electromagnet. She notices that when she increases the size of the batteries (voltage) powering the electromagnet, something happens to the strength of the magnetic force. What happens to the strength of the magnetic force?

• The magnetic force increases

• The magnetic force stays the same

• The direction of the force reverses

• The magnetic force decreases

Tags

NGSS.MS-PS2-3

In an electromagnet, what happens if you remove the iron core?

• The magnetic field disappears completely

• The magnetic field becomes stronger

• The magnetic field becomes weaker

• The magnetic field direction reverses

Which material is commonly used as a core to enhance the strength of an electromagnet?

• Plastic

• Wood

• Iron

• Glass

Which of the following is NOT a way to increase the strength of an electromagnet?

• Decreasing the current

• Using a larger iron core

• Increasing the voltage

• Increasing the number of wire turns