W Magnetic Fields Quiz 1

Class period

• 2nd
• 3rd
• 4th
• 5th

A student rubs a comb on a cloth. She then holds the comb 30 centimeters above some small pieces of paper on a table, but the paper does not move. When the comb is moved closer to the paper, the paper moves through the air to the comb.

• The paper is not attracted to the comb.
• The comb and the paper have identical charges.
• Only metallic objects can be attracted to each other.
• The attractive field from the comb is weaker farther from the paper.

A student is conducting an investigation to show how magnetic forces can act at a distance from an object. What can the student conclude from the data that he gathered in his investigation?

• The force is not related to the distance from the object.
• The force of the magnet becomes stronger the farther it is from the object.
• The force is stronger with less distance between the magnet and the object.
• The force of the magnet becomes stronger and then weaker the farther it is from the object.

A teacher sprinkles some iron shavings on a clear tray. She places two magnets in the shavings with the north ends facing each other. Based on the cause-and-effect relationship between the magnets, which phenomenon is the teacher modeling for her students?

• electrical force
• attractive force
• field of repulsion
• gravitational attraction

Take a look at the magnets below. Would the two magnets repel or attract?

• Attract
• Repel

Take a look at the picture below. Would the two magnets repel or attract?

• Attract
• Repel

What's the definition for attract?

Opposite poles repel and like poles attract.

• True
• False

What is the definition for repel?

Ramon puts two magnetic toy trains next 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.