contestada

If the charge is tripled for two identical charges maintained at a constant separation, The electric force between then will be changed by what factor?

A: 1/9
B: 2/3
C: 9
D: 18

Respuesta :

Answer:

The electric force between them will be changed by the factor, E = 9

Explanation:

Given data,

The charge of the two identical charges, q = Q C

The distance between the charges, d = x

According to the Coulomb's law, the electric force between the two charges is given by,

                                             F = k QQ/ x²

   Where,

                           k is a constant equal to 9 x 10⁹ N m² C⁻²

If the amount of charges are tripled,

                                             F' = k (3Q)(3Q)/x²    

                                             F' = 9 k Q Q / x²      

                                             F' = 9 F

Hence, the electric force between them will be changed by the factor, E = 9

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