Electric Forces

In order to create an electric charge, what type of particle must be added or removed from an object?

• proton

• electron

• neutron

• alpha particle

Tags

NGSS.HS-PS2-4

A balloon has a negative charge. A glass rod has a positive charge. What will happen when the rod is brought near the balloon?

• the balloon will be attracted to the rod

• the balloon will remain in place

• the balloon will be repelled by the rod

• the balloon will spin in circles

Tags

NGSS.HS-PS2-4

Two charges are near each other. The magnitude of both charges is doubled. By what factor will the Coulomb force change?

• 2

• 4

• 1/2

• 1/4

Tags

NGSS.HS-PS2-4

If the distance between two charges triples, by what factor will the force between them change?

• 3

• 9

• 1/3

• 1/9

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

What is the magnitude of the electric force between two charges of 1.0C separated by a distance of 1.0m?

• 9.0x10^9 N

• 1.1x10^10 N

• 9.0x10^19 N

• 1.1x10^-10 N

Tags

NGSS.HS-PS2-4

Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.

• -1.5E-11N
• -2.5E11N
• -2.5E-11N
• -7.5E-10N

Tags

NGSS.HS-PS2-4

Two oppositely charged particles are held in place near each other. When the particles are released, what will most likely happen?

• they will accelerate towards each other
• they will accelerate away from each other
• they will move towards each other at a constant speed
• they will move away from each other at a constant speed

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

The distance between two charges doubles at the same time that the charge on each also doubles. What happens to the electric force?

• doubles
• quadruples
• cut in half
• no change

Tags

NGSS.HS-PS2-4

As shown in the figure, the charge Q is midway between two other charges. If Q= -7.5 nC what must be the charge q1 so that charge q2 remains stationary as Q and q1 are held in place?

• 30 nC

• 15nC

• 7.5nC

• 60nC

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

If an object has a net charge of +2e this means it has

• lost 2 electrons
• gained 2 electrons
• lost 2 protons
• gained 2 protons