Question

Two identical metallic sphere are charged with 10 and -20 units of charge. If both the spheres are first
brought into contact with each other and then are placed to their previous positions, then the ratio of the
force in the two situations will be :-
(1) -8:1
(2) 1:8
(3) -2:1
(4) 1:2​

Answer 1

Answer:

-8:1 is the answer

Charge is uniformly distributed to two sphere when they are taken close to each other i.e in contact

as F directly proportional to q1*q2

F1/F2 = (q1*q2 )initial /(q1*q2) final

= 10 * (-20)/ (-5)(-5)

=-200/25

= -8:1 is the answer

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