T3L3 Quiz

How does an electromagnet work? Choose the best answer.

• A current flows through a wire wrapped around a metal core, creating a magnetic field.

• A battery connects directly to a metal object, turning it into a magnet.

• A wire loop creates electricity, which becomes magnetic.

• A nail and a battery alone create a magnetic field.

Tags

NGSS.MS-PS2-3

What is the role of a battery in an electromagnet? Choose the best answer.

• It supplies the electric current needed to produce a magnetic field.

• It strengthens the magnetic field directly.

• It powers the wire loops to heat the magnet.

• It connects the nail to the wire.

How can the strength of an electromagnet be increased? Choose the best answer.

• Add more loops of wire around the core.

• Use less wire around the core.

• Space out the wire loops further apart.

• Reduce the current in the wire.

What tool can help determine the direction of a magnetic field? Choose the best answer.

• A compass

• A ruler

• A thermometer

• A stopwatch

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What happens when you add more loops of wire to an electromagnet? Choose the best answer.

• The magnetic field becomes stronger.

• The magnetic field disappears.

• The nail becomes weaker.

• The battery loses power instantly.

What material is typically used as the core of an electromagnet? Choose the best answer.

• Iron

• Plastic

• Aluminum

• Glass

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Which of the following weakens an electromagnet? Choose the best answer.

• Use less wire around the core.

• Add more loops of wire around the core.

• Increase the current in the wire.

• Use a stronger battery.

Tags

NGSS.MS-PS2-3

What happens to the magnetic field when the electric current is increased?

• It gets stronger.

• It gets weaker.

• It stays the same.

• It reverses direction.

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How does a magnetic field behave around a wire loop?

• It forms circular patterns around the wire.

• It spreads out in straight lines.

• It disappears when the current flows.

• It only appears at the edges of the wire.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What happens if you remove the battery from an electromagnet?

• The magnetic field disappears.

• The nail stays magnetic permanently.

• The wire produces its own magnetic field.

• The loops stop conducting electricity.

Tags

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