By what factor will the electric force between two charged objects change if the charge on one object is quadrupled?
a. 1/4
b. 4
c. 8
d. 16

b. 4

Explanation:

The electric force between two charged objects is given by:

where

k is the Coulomb's constant

q1 and q2 are the charges of the two objects

r is the separation between the two objects

In this problem, we have that the charge of one object is quadrupled:

while all the rest remain unchanged. So the new electric force between the two objects is

So, the force will quadruple as well.

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think its the third option