Electric Field Strength

In the diagram below, P is a point near a negatively charged sphere. Which direction best represents the direction of the electric field at point P?

• Right
• Left
• Up 
• Down

Tags

NGSS.HS-PS2-4

A point charge of 0.003 Coulombs is far away from other charges. At a distance of 0.5 meters from the charge, what is the magnitude of the electric field strength?

• 5.4 x 10^7 [N/C]

• 1.08 x 10^8 [N/C]

• 3.375 x 10^6 [N/C]

• 10 [N/C]

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

Tags

NGSS.HS-PS2-4

At which point is the electric field the weakest?

• A because it is the furthest away
• A because the field lines are further apart
• C because the field lines are further apart
• C  because it is the furthest away

Tags

NGSS.HS-PS2-4

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

An electrostatic force of 2 X 10². newtons is exerted on a charge of 4 coulomb at point P in an electric field. The magnitude of the electric field intensity at P is

• 8 X 10² N/C
• 5 N/C
• 2 X 10^-2 N/C
• 50 N/C

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? Hint: What is the charge of a single proton?

• 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

The force between two point charges is F when they are separated by a distance r. If the separation is increased to 3r what is the force between the charges?

• F/3r

• F/9r

• F/3

• F/9

Tags

NGSS.HS-PS2-4

Which statement is incorrect?

• The direction of electric field lines represents the direction that a positive charge would move in the field.
• The distance between the lines represents the strength of the field.
• The closer the field lines are, the weaker the field.
• An electric field is a region where a charged particle will experience a force