January 7, 2025 DOL

According to Coulomb’s law, what is the relationship between distance and electrical force?

• Directly proportional

• Inversely proportional

• Neutral

• Obscure

The Q in Coulomb's law equation stands for the _____.

• mass of a charged object

• the current of a charged object

• the distance between charged objects

• charge of a charged object

A charge of 4.0 x 10⁻⁶C is held a distance of 0.70 m from a second balloon having the same charge. Calculate the magnitude of the repulsive force.

• 2.9 x 10⁻¹ N

• 4.0 x 10⁻⁶ N

• 4.5 x 10⁻¹ N

• 0.33 x 10⁻¹ N

Joann has rubbed a balloon with wool to give it a charge of -1.0 x 10⁻⁶ C. She then acquires a plastic golf tube with a charge of +4.0 x 10⁻⁶ C localized at a given position. She holds the location of charge on the plastic golf tube a distance of 50.0 cm above the balloon. Determine the electrical force of attraction between the golf tube and the balloon.

• 4.5 x 10⁻⁴ N

• 1.44 x 10⁻¹ N

• -1.0 x 10⁻⁶ N

• 2.0 x 10⁻⁶ N

Two balloons with charges of +6.37 x 10^-6 C and -3.21 x 10^-6 C attract each other with a force of 9.28 x 10^-4 Newtons. Determine the separation distance between the two balloons.