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Question

One form of coulomb's law in electricity states that d=k square root q1q2  In the formula, d is the distance between two charged bodies, and q1 and q2 are the charges carried by the bodies. when q 1=1, d=5 cm, and k=4, Find q2.

Answer 1

d=k*root(q1*q2)

d/k=root(q1*q2)

(d/k)^2=q1*q2

q2=(d/k)^2/q1

q1=1, d=5cm, k=4

d/k=5/4=1.25

square=1.5625

q2=1.5625/q1

=1.5625

Answer 2

5=4sqrt(q2); q2=(5/4)^2=25/16, q2=1.5625 Coulomb.