Q.A metallic sphere of radius $R$ having charge $Q$ is placed at a very large distance from another metallic sphere of radius $2R$ having charge $2Q$ . The minimum distance between their centres so that they touch each other externally is (JEE Main 2024)

3R

4R

2R

5R

The correct solution involves applying the fundamental concept to derive the final value step by step...

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Q.A metallic sphere of radius RRR having charge QQQ is placed at a very large distance from another metallic sphere of radius 2R2R2R having charge 2Q2Q2Q. The minimum distance between their centres so that they touch each other externally is (JEE Main 2024)