NEET2021Physics-Electrostatic Potential
NEET 2021 Physics Potential of Combined Drops MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Twenty seven drops of same size are charged at 220 V each. They combine to form a bigger drop. Calculate the potential of the bigger drop.
A
660 V
B
1320 V
C
1520 V
D
1980 V
Correct Answer
Option D
Detailed Explanation
When drops combine, the volume of the bigger drop is 27 times the volume of one drop. The potential of the bigger drop is given by V = kQ/R, where R is proportional to the cube root of the volume. Thus, the potential increases by 27^(1/3) times, making it 1320 V.
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