Answer to Question #308782 in Electricity and Magnetism for Kell

Question

Object A and Object B are charged with +47.4 μ coulombs and +16.3 μ coulombs, respectively. Given that the two objects are separated by 0.64 m, Which of the following statements is/are valid?

a. Object A attracts object B with a force of 27.1 N

b. Object A repels object B with a force of 17:0N

c. Object B attracts object A with a force of 27.1N

d. Object A attracts object B with a force of 118.7 N

e. Object 8 repeli object A with a force of 120 N

1. Object Battracts object A with a force of 118.7 N

Object 8 repels object A with a force of 433 N

n Object A repels object 8 with a force of 43. N

Answer 1

We know that Electric

force

$F=\frac{kq_1q_2}{r^2}$

$$F=\frac{9\times10^9\times47.4\times10^{-4}\times16.3\times10^{-13}}{0.64^2}=17N$$

Repulsion force

Option (b) is correct option