Coulomb 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

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

• C

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

• charge

• Coulomb's Constant

• kilometers

• distance between charges

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

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

How strong is the attractive force between a glass rod with a 0.700μC

charge and a silk cloth with a –0.600μC

charge, which are 12.0 cm apart, using the approximation that they act like point charges?

• -3.5 x 10^-2 N

• -263 N

• -0.263 N

• -3.5 x 10² N

• -0.315 N

A point charge (q1) has a magnitude of 3x10^-6 C. A second charge (q2) has a magnitude of -1.5x10^-6 C and is located 0.12 m from the first charge. Determine the electrostatic force each charge exerts on the other.

• -4.52 x 10^-3 N

• -83 N

• -2.81 N

• -9 x 10³ N

According to Coulomb's Law, when the distance increases, the electrostatic force ____________.

• increases

• decreases

• remains unchanged

• has no relationship to distance

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