Electrostatics Question 74

Question: A charge of 109C is placed on each of the 64 identical drops of radius 2cm . They are then combined to form a bigger drop. Find its potential [MP PET 1997]

Options:

A) 7.2×103V

B) 7.2×102V

C) 1.44×102V

D) 1.44×103V

Show Answer

Answer:

Correct Answer: A

Solution:

V=n2/3v

therefore V=(64)2/3×9×109×109(2×102) = 7.2 x 103 V



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