JEE Main202225 Jun 2022Evening ShiftPhysicsElectrostaticsActual

27 identical drops are charged at 22 V each. They combine to form a bigger drop. The potential of the bigger drop will be _____ V .

Correct answer

Step-by-step solution

Total volume of the drop will remain unchanged, So, 27 × 4 3 π r 3 = 4 3 π R 3 ⇒ R = 3 r Potential of the small drops, 22 = k q r For bigger drop, potential will be V = k 27 q 3 r = 9 k q r = 9 × 22 = 198   V

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