Electrostatics

Consider the conduction charging shown. 

• Electrons move from the insulating stand into the sphere.
• Protons move from the bar into the sphere.
• Electrons move from the charged metal bar into the sphere.
• Protons move from the sphere into the negatively charged bar.

Tags

NGSS.HS-PS3-5

This image shows the before picture, when a balloon is rubbed with polyester. Identify the correct after picture.

• 
• 
• 
• 

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NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Two electrically neutral metal spheres, A and B, on insulating stands are placed in contact with each other. A negatively charged rod is brought near, but does not touch the spheres, as shown in the diagram below. How are the spheres now charged?

• A is positive and B is positive.
• A is negative and B is positive.
• A is positive and B is negative.
• A is negative and B is negative.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

What is the name of this device that is used to detect charges?

• beaker
• electroscope
• van de graff generator
• chargometer

What method of static charging is shown in this picture

• Contact

• Friction

• Grounding

• Electron Shifting

What is the overall charge on this balloon? (They are the same so look at either one!)

• +3
• -6
• +6
• -3

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Why does the child's hair stick up?

• The boy is grounded since he's at the bottom of the slide

• He gained a charge from the slide, and since he's not grounded, his hairs have the same charge so they repel one another

• He gained a charge from the slide, and since he's not grounded, his hairs have opposite charges so they repel one another

• When hair is neutral, some have a positive side and some have negative side, so they will attract to each other, making it stand up

Tags

NGSS.HS-PS2-4

Examine Before and After picture. Why do electrons move the way they did?

• This is grounding - electrons want to even out

• This is charging by contact - electrons go to the larger object

• This is charging by contact - electrons go from the object with less e- affinity to more e- affinity.

• This is charging by contact - electrons want to even out

Which of the following DOES NOT use electrostatics to work?

• Dryer sheets
• Electric Motor
• Photocopier
• Van de Graff Generator

What is the electric force between a charge of 2* 10-6C and a charge of 5*10-6C? The charges are 4m away. Coulombs constant is 9.0 * 109.

• 0.02 N

• 0.09 N

• 0.006 N

Tags

NGSS.HS-PS2-4