Coulomb's Law

Which of the following charges will attract each other?

• -4 μC & -5 μC

• 4 μC & 5 μC

• 4 C & 5 C

• -4 μC & 5 μC

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What is the standard unit for charge?

• Newtons (N)

• Coulombs (C)

• Electros (e)

• Protos (P)

What letter is used to denote "charge"?

• k

• q

• r

• e

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What does the "k" represent in Coulomb's Law?

• charge

• Coulomb's Constant

• kilometers

• distance between charges

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What does the "r" represent in Coulomb's Law?

• radius of the electron

• distance between charges

• radius of the proton

• distance a charge will travel

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What is the value of Coulomb's Constant?

• 9 x 10⁹ Nm²C^-2

• 8.987 Nm²C^-2

• 8.987 x 10¹¹ Nm²C^-2

• 7.1 x 10^4.5 Nm²C^-2

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If two equal charges each of 1 C each are separated in air by a distance of 1 km, what is the magnitude of the force acting between them?

• 1 N

• 9 x 10⁹ N

• 9 x 10³ N

• 9 x 10⁶ N

• 1 x 10² N

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A 5 C and 8 C are 8 m apart. What is the force between them?

• 5.625 x 10⁹

• 5.625 x 10^-9

• 4.5 x 10¹⁰

• 4.5 x 10^-10

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If two balloons have the same charge, what will happen if you place them close to each other?

• Nothing
• They will be attracted
• They will pop
• They will push each other away.

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