JEE Main 2022 Physics question

A charge of 4 is to be divided into two. The distance between the two divided charges is constant. The magnitude of the divided charges so that the force between them is maximum, will be:

(1)1 and 3
(2)2 and 2 Correct
(3)0 and 4
(4)1.5 and 2.5

Answer: (2)

Solution

Let the charges be q and (4 − q) . The force is

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Question ID VK-034275