Gravity, Electricity, and Magnetism

Which of the following might make the spoons repel each other?

• Neither A nor B is electrically charged.

• Both A and B are negatively charged.

• A is positively charged, and B is negatively charged

• A is negatively charged, and B is not electrically charged.

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NGSS.MS-PS2-3

Electrical current can produce which type of force?

• Chemical

• Gravitational

• Magnetic

• Nuclear

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NGSS.MS-PS2-3

Two negatively charged particles are 1 millimeter apart. The electric force between them is 20 Newtons. How will the amount of electric force between the particles change if the particles move closer together

• force will increase

• force will decrease

• force will stay the same

• force will disappear

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NGSS.MS-PS2-3

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Adding a second battery to an electromagnet will _____.

• decrease the resistance in the wire

• decrease the magnetism in the wire

• increase the current flowing through the wire

• increase the amount of current needed to magnetize the wire

Which of the following statements describes an electric generator?

• A magnet is rotated through a coil of wire to produce an electric current.

• Electric potential in a rotating coil of wire creates a permanent magnet.

• An electrical current causes a coil of wire to rotate in a magnetic field

• Forces from a permanent magnet allow a coil of wire to rotate.

Which diagram correctly represents the direction of the magnetic field around a bar magnet?

• 
• 
• 
• 

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NGSS.MS-PS2-3

As the number of turns on an electromagnet is decreased, the pole strength of the electromagnet

• Decreases

• Increases

• Remains the same

Which diagram best illustrates the magnetic field that exists around a current- Carrying wire?

• 
• 
• 
• 

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Two magnets move away from each other. What happens to the magnetic attraction between them as they become further apart?

• It decreases

• it increases

• it becomes zero

• it does not change

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

A magnet sticks to a table leg. Based on this information, which material could the table leg be made of?

• Iron

• wood

• copper

• aluminium

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