Electromagnetism Quiz

A bar magnet is divided into two pieces. Which of the following statements is true about the force between the broken pieces if they face each other with a small separation?

• There is a magnetic attractive force between the broken pieces.

• There is an electric repulsive force between the broken pieces.

• There is a magnetic repulsive force between the broken pieces.

• There is an electric attractive force between the broken pieces.

What is referred to as the process of inducing a current in a changing magnetic field?

• Electromagnetic Induction

• Electromagnetism

• Magnetic field

• Magnetism

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NGSS.HS-PS2-5

Which statement about an electromagnet is TRUE?

• The electric field strength is inversely proportional to the current.

• The electric field surrounding a battery-powered electromagnet alternates constantly.

• The magnetic field lines produced are all straight.

• The current in the electromagnetic coil temporarily magnetizes the iron core.

How can we increase the strength of the magnetic field of an electromagnet?

• expose to more light

• add more copper wire to coil

• put more paper clips to pick up

• clip on the alligator clips

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Which of the following serves as core of electric current in an electromagnet?

• battery

• iron nail

• copper wire

• thumbtacks

battery

• Permanent

• Temporary

If one magnet's south pole is facing another magnet's south pole, would the magnets repel or attract?

• Both

• Neither

• Attract

• Repel

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NGSS.MS-PS2-3

If magnet A can attract and hold 2 steel pins and magnet B can attract and hold 4 steel pins, which magnet is stronger?

• Magnet A

• Magnet B

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NGSS.3-PS2-4

What is the area around the magnet where you can feel the effects of the magnet called?

• area of magnetism

• magnetic field

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NGSS.MS-PS2-5

Where is the bar magnet strongest?

• at the poles

• in the middle

• it's the same everywhere

• in the arms