Electrostatics

An instrument used to detect the presence of a static charge is the___________.

Three rods of different materials P, Q, and R, are charged by various methods. When the rods are brought near each other, the rods P and Q repel each other, while the rods P and R attract each other. Which of the following would be the signs of the charges on the rods?

• Rod P Rod Q Rod R

  negative positive negative

• Rod P Rod Q Rod R

  positive positive negative

• Rod P Rod Q Rod R

  negative negative positive

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

When two bodies are charged, the total charge before and after charging remains the same because of ___.

• quantization of charges

• law of induction

• Coulomb’s law

• Conservation of Charges

_____ force between charges is enormous in comparison to _____ force.

• Electrostatic, Gravitational

• Gravitational, Electrostatic

• Positive, Negative

• Negative, Positive

Tags

NGSS.HS-PS2-4

Most static electricity is produced by

What does the "static" mean in static electricity?

Oppositely charged objects ______________ each other.

A material through which electrons do not move easily is called a(n)

lightning is ____________

• a very large discharge of static electricity

• a buildup of neutrons

• a low voltage electric current

• harmless

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of the following statements is true about electrostatic forces?

• They only occur between charged objects.

• They are always attractive.

• They are independent of the distance between objects.

• They only occur in a vacuum.

Tags

NGSS.HS-PS2-4