Fields and Forces

Which quantity and unit are correctly paired?

• electric field strength and N/C
• electricity and Coulombs
• electrostatic force and electrons
• electric field strength and E

A point charge Q is far from all other charges. At a distance of 2 m from Q, the electric field is 20 N/C. What is the force a charge of 5 Coulombs feels?

• 4 N
• 100 N
• 40 N
• 10 N

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Which of the following statements is false about electric field lines

• electric field lines cannot cross
• electric field lines point away from positive charge
• electric field lines are always straight lines
• electric field lines show how a proton would move in an electric field

At which point is the electric field the strongest

• A
• B
• C
• D

Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.

• +,+
• +,-
• -,+
• -,-

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Which of the following is a true statement about the electric field between the two plates?

• The field is attractive between the plates and uniform in strength
• The field is repulsive between the plates and uniform in strength
• The field is attractive between the plates and strongest near the positive
• The field is repulsive between the plates and strongest near the positive

Tags

NGSS.HS-PS3-5

The electrical force between charges is strongest when the charges are

• close together
• far apart
•  the electric force is constant everywhere.
• there is no pattern

Tags

NGSS.HS-PS2-4

What is the magnitude of the electric field intensity at a point where a proton experiences an electrostatic force of magnitude 2.30 x 10^-25 newton?

• 1.44 x 10^-6 N/C
• 3.68 x 10⁶ N/C
• 1.44 x 10⁴⁴ N/C
• 3.68 x 10^-44 N/C

Tags

NGSS.HS-PS2-4

The image shows two charged particles with a force of 2.4 N. What would you predict the force of interaction would be when the magnitude of charge on q2 doubles?

• 9.6 N

• 4.8 N

• 1.2 N

• .6 N

Tags

NGSS.HS-PS2-4

The image shows two charged particles with a force of 2.4 N. What would you predict the force of interaction would be when the distance doubles?

• 4.8 N

• 1.2 N

• .6 N

• .3 N

Tags

NGSS.HS-PS2-4