Coulomb's Law and Electric Fields

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

• +, +

• +, -

• -, +

• -, -

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NGSS.HS-PS2-4

NGSS.HS-PS3-5

Coulomb's law also says if distance increases, then force

• decreases

• disapears

• destroyed in a heartbeat

• doubles

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NGSS.HS-PS2-4

Coulomb’s law states that the force between two charged objects will __________ when the magnitude (value) of the object’s charge increases.

• increase

• decrease

• stay the same

• first increase, then decrease

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NGSS.HS-PS2-4

If one of the charges doubles, what happens to the force?

• it doubles

• it gets cut in half

• it quadruples

• it is cut by 1/4

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NGSS.HS-PS2-4

The electric field lines for a positive charge is always directed away from the charge. True or False?

• True

• False

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

Where can an electric field be found?

• below a force field

• in a gravitational field

• in the space surrounding a charged object

• outside of a magnetic field

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NGSS.HS-PS3-5

The variable "r" in Coulomb's Law would have what units?

• Joules

• Coulombs

• Newtons

• Meters

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NGSS.HS-PS2-4

What happens to the force between two charged objects if you reduce the distance between two objects from 30 cm to 10 cm?

• 3X

• 20X

• 9X

• 1/3X

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NGSS.HS-PS2-4

What is the value of Coulomb's Electrostatic Constant?

• 8.99 x 10⁹ Nm²C^-2

• 8.987 Nm²C^-2

• 8.987 x 10¹¹ Nm²C^-2

• 7.1 x 10^4.5 Nm²C^-2

Tags

NGSS.HS-PS2-4