If charge on each of two point charges is tripled and separation between them is doubled, by what factor will the mutual force between them change?
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If charge on each of two point charges is tripled and separation between them is doubled, by what factor will the mutual force between them change?

G1 Physics · Accepted Answer

Step 1: Identify the relevant electrostatic principle—Coulomb's law, superposition, Gauss's law, potential-energy conservation or conductor boundary conditions. Step 2: Write the corresponding equation using the quantities in the question and simplify the geometry. Step 3: Substitute the given values and compare with the alternatives. Final: A: 9F/4.