Question

Which change increases the electric force between objects?

Answer 1

By definition we have that the electric force is given by:

$F = k * (\frac{q1q2}{d ^ 2})$

Where,

k: proportionality constant

q1: electric charge of object 1

q2: electric charge of object 2

d: distance between both objects

Therefore, to increase the electric power there are two possible cases:

1) Add more load to each object

2) Decrease the distance between objects.

The option that increases the electric force for this case is:

Electrons are added to two negatively charged objects.

This is because the values of q1 and q2 increase.

Answer:

A change that increases the electric force between objects is:

B) Electrons are added to two negatively charged objects.

Answer 2

From that list of choices, the only one that would increase the
strength of the electrostatic force between two objects is  ' B ' .