Electric Charge and Force

Electric charges that are alike _______ each other.

• Attract

• Repel

How will the two balloons interact?

• Attract

• Repel

• No interaction

How will the two balloons interact?

• Attract

• Repel

• No interaction

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

This table shows the magnitude of electromagnetic force exerted by two electromagnets on each other as the distance between the two electromagnets is varied.

(See Attached Diagram)

The data on the table provide evidence for which of the following conclusions?

• The force between any two magnets is always constant, regardless of distance.

• As distance between electromagnets increases, the electromagnetic force also increases.

• The smaller the distance between two electromagnets, the greater the force.

• The force between two magnets depends only on the charge of the electromagnets.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Students attached both ends of a long wire to the poles of a battery and wrapped the wire around a spoon. In this arrangement, the spoon is able to pick up five paper clips. (See Attached Diagram) The students wrap more wire around the spoon and want to determine if the strength of the magnetic force has increased. Which of the following observations would indicate that wrapping more wire has increased the strength of the electromagnet?

• More wire was needed to wrap around the spoon.

• The spoon now picks up seven paper clips.

• Eventually, the battery runs out of energy.

• The ends of the wire must touch the battery's poles.

Tags

NGSS.MS-PS2-3

A student attaches two identical balloons (X and Y) to the ceiling using a nylon thread so that the balloons are near each other. The table shows the observations from three different activities performed with the balloons.

What evidence supports that there is a non-contact force between the balloons?

• The balloons are not in contact and tend to move away from each other when both are rubbed with wool.

• The balloons are not in contact and tend to move away from each other when both are rubbed with rubber.

• The balloons are not in contact and tend to move close to each other when both are rubbed with a glass rod.

• The balloons are not in contact and tend to move close to each other when both are rubbed with wool.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The table shows information about pairs of charged spheres. In which pair do the spheres exert the weakest electrical force on each other?

• Pair W

• Pair X

• Pair Y

• Pair Z

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Marty rubbed a balloon on his shirt. The balloon was then able to stick to the wall of the room. Which picture BEST represents the charges of the particles on the balloon and the wall that cause the balloon to be attracted to the wall?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the tendency to push other objects away from it called?

• Magnitude

• Attraction

• Repulsive

• Current

• Charged object

When the currents of two electromagnets are increased, what happens to the size of the force?

• Decreases

• Increases

• Stays the same

• Reverses

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5