Coulomb's Law Practice

What happens to the force between two charged objects if you triple the magnitude of one charge? 

• 1/3X
• 3X
• 1/9X
• 9X

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

• 1/3X
• 20X
• 3X
• 9X

What happens to the force between two charged objects when you triple the magnitude of both charges?

• 3X
• 6X
• 9X
• 1/6X

When distance increases, electrostatic force ____________; we call this relationship ____________ proportional

• decreases;directly
• decreases;inversely
• increases;inversely
• increases;directly

Find the magnitude of the force between two charges of 1.0 C each which are 1.0 meter apart?

• 9E-9 N
• 9E9 N
• 1.1E10 N
• 1.1E-10 N

Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.

• -1.5E-11 N
• 2.5E-11 N
• -2.5E11 N
• -7.5E-10 N

The distance between two charges doubles at the same time that the charge on each also doubles.  What happens to the electric force?

• doubles
• quadruples
• cut in half
• no change

Two charges separated by a distance of 1 meter exert a 20-N force on each other. If the charges are pulled to a 2 meter separation distance, the force on each charge will be 

• 10 N
• 5 N
• 2.5 N
• 40 N

A 2-C charge and 4 -C charge attract each other with 10 N of force. How much will a 2-C charge and 8-C charge attract each other when placed the same distance apart?

• 5 N

• 12 N

• 10 N

• 20 N

The electrical force between charges is strongest when the charges are

• close together
• far apart
•  the electric force is constant everywhere.
• there is no pattern