Gravity, Electricity and Magnetism

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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• 
• 

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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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NGSS.MS-PS2-3

NGSS.MS-PS2-5

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

Tags

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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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which statement correctly describes the relationship that exists between the length of a wire and the amount of current?

• Twice the length of wire allows twice the amount of current.

• Decreasing the amount of current limits the length of the wire

• Twice the amount of current occurs in half the length of wire.

• Decreasing the length of the wire decreases the amount of current.

There are three ways in which an object can become electrically charged:

Conduction, Induction, Friction

Which two of these methods require that the objects come into direct contact (touch), in order to transfer charges

• 1 &2

• 1& 3

• 2 & 3

What is the force that keeps planets in orbit around the sun?

• Gravity

• Electricity

• Magnetism

• Nuclear force

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

NGSS.MS-PS2-4