64 identical drops each charged upto potential of 10 mV are combined to form a bigger drop. The potential of the bigger drop will be_____mV.
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(160)
The formula to calculate the potential (V") of each tiny drop is given by
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When all the drops forms the bigger drop the radius of the new drop (r’) can be calculated as follows: Volume of big drop = 64 x volume of each tiny drop
So, the potential of the new big drop (V’) can be written as
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Divide equation by equation and simplify to obtain the potential of the new drop.
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Substitute the value of the known parameter into equation to calculate the required value of the potential for the new drop.
v'=16 x 10 mV
=160 mV
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