Question

Charges of +3 µC and –5 µC are 2 mm from each other. The –5 µC charge is replaced with a +5 µC charge. How will the electrical force between the charges compare with the original force? a. same force, but in the opposite direction b. same force, but in the same direction c. greater force, but in the opposite direction d. greater force, but in the same direction

Answer 1

Answer:

a. same force, but in the opposite direction

Explanation:

Charges of +3 µC and –5 µC are 2 mm from each other. The –5 µC charge is replaced with a +5 µC charge. How will the electrical force between the charges compare with the original force? a. same force, but in the opposite direction b. same force, but in the same direction c. greater force, but in the opposite direction d. greater force, but in the same direction

we know from electric force field that the electric force is directly proportional to the product of the two charges and inversely proportional to the square of the distance apart of the two charges

F=k$\frac{Qq}{r^2}$

k=constant

Q and q= are electric charges measured in coulombs

r=distance apart

k(3)(-5)/r^2=k(3)(5)/r^2

the Left hand side is negative while the right hand side is positive

so b holds