Magnetic Fields

Cherise sets identical magnetic cats on two tracks. At the end of each track is a blue magnet that cannot move. Cherise can move the carts one space to the left or one space to the right. Which movement will result in the largest increase in potential energy?

• Moving the cart on Track 1 one space to the right (-->)

• Moving the cart on Track one space to the left (<--)

• Moving the cart on Track 2 one space to the right (-->)

• All these movements will result in the same change in potential energy because they each move a cart the same distance.

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NGSS.MS-PS3-2

Ramon puts two magnetic toy trains very close to each other on a track. What will happen next, and why?

• The trains will move closer to each other because the magnetic force will pull the trains together.

• The trains will not move because the magnets are not touching.

• The trains will move away from each other because the magnetic force will push the trains apart.

• The trains will move away from each other because the magnets are not touching.

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In a computer simulation, Jeffrey moves a magnet (Magnet 2) toward another magnet (Magnet 1) that cannot move. What happens to the potential energy in the system of magnets?

• The potential energy does not change because the magnets in the system do not change.

• The potential energy increases because Magnet 2 moves against the magnetic force.

• The potential energy decreases because Magnet 2 moves against the magnetic force.

• The potential energy decreases because Magnet 2 moves in the same direction as the magnetic force.

Tags

NGSS.MS-PS3-2

LOOK AT THIS IMAGE: Based on the two magnetic objects, what type of magnetic forces are we observing?

• Kinetic energy

• Attracting

• Repelling

• Potential energy

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Based on the magnetic field line diagrams, what will happen next with these two set of magnets?

• The magnets in Set 1 will repel, and the magnets in Set 2 will attract.

• The magnets in Set 1 will attract, and the magnets in Set 2 will repel.

• The magnets in Set 1 will not move, and the magnets in Set 2 will attract.

• In the both sets, the magnets will attract.

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NGSS.MS-PS2-3

Bryce moves a magnetic toy train away from a magnet that cannot move. What happens to the potential energy in the system of magnets during the movement.

• The potential energy decreases because the train moves in the same direction as the magnetic force.

• The potential energy decreases because the train moves against (away) the magnetic force.

• The potential energy increases because the train moves against (away) the magnetic force.

• The potential energy does not change because the magnets in the system do not change.

Tags

NGSS.MS-PS3-2

LOOK AT THE IMAGE: Lin sets identical magnetic carts on two tracks. At the end of each track is a blue magnet that cannot move. Lin can move the carts one space to the left or one space to the right. Which movement will increase the potential energy in the system the most?

• Moving the cart on Track 2 one space to the right (→)

• Moving the cart on Track 2 one space to the left (←).

• Moving the cart on Track 1 one space to the right (→).

• All these movements will result in the same change in potential energy because they each move a magnetic cart the same distance.

The area of magnetic force around a magnet is known as its _____________.

• magnetic field

• magnetic declination

• magnetic fan lines

• magnetic tan lines

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How does a system of magnets store potential energy in the magnetic field?

• The energy used to move a magnet with (same direction as) a magnetic force.

• The energy used to move a magnet against (opposite direction as) a magnetic force.

• Magnets get their potential energy from kinetic energy.

Tags

NGSS.MS-PS3-2

What happens when two north poles of a magnet are placed together?

• they repel

• they attract

• they cancel each other out

• the strength of the magnet is doubled

Tags

NGSS.MS-PS2-3