Electrostatics

Which of the following labeled points is in the region with the strongest force of electric charge

• A
• B
• C
• D

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

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

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

Which net charge could be found on an object?

• 4.8 x 10^-19 C
• 1.8 x 10^-19 C
• 3.0 x 10^-19 C
• 2.8 x 10^-19 C

Tags

NGSS.HS-PS2-4

Metal sphere A has a charge of +12 elementary charges and identical sphere B has a charge of +16 elementary charges. After the two spheres are brought into contact and separated, the charge on sphere A is

• +14 elementary charges
• +28 elementary charges
• +2 elementary charges
• -2 elementary charges

Tags

NGSS.HS-PS2-4

Electrostatic force F exists between two point charges. If the both charges are doubled, the force between the charges will be

• F
• 4F
• 2F
• F/4

Tags

NGSS.HS-PS2-4

An electrostatic force of magnitude F exists between two metal spheres having identical charge q. The distance between their centers is r. Which combination of changes would produce no change in the electrostatic force between the spheres?

• doubling q on both spheres while halving r
• doubling q on one sphere while halving r
• doubling q on one sphere while doubling r
• doubling q on both spheres while doubling r

Tags

NGSS.HS-PS2-4

Two similar metal spheres, A and B, have charges of +2.0 x 10^-6 coulomb and +1.0 x 10^-6 coulomb, respectively. The magnitude of the electrostatic force on A due to B is 4.0N newtons. What is the magnitude of the electrostatic force on B due to A?

• 2.0N
• 4.0N
• 8.0N
• 1.0N

Tags

NGSS.HS-PS2-4

A metal sphere having an excess of +5 elementary charges has a net electric charge of

• 8.0 x 10^-19 C
• 8.0 x 10¹⁹ C
• 1.6 x 10^-19 C
• 5.0 x 10^-19 C

Tags

NGSS.HS-PS2-4

A metal sphere having an excess of +5 elementary charges has a net electric charge of

• 8.0 x 10^-19 C
• 8.0 x 10¹⁹ C
• 1.6 x 10^-19 C
• 5.0 x 10^-19 C