Question

JULY
H/W
1) 125 identical drops each charged to
the same potential of 50 volt are
'to form a single dron. The
potential of
new drop will be
) 501 2) 250V
7
AUGUS
Notes
3) 500V
40 1250 1
X

Answer 1

Explanation:

V1 = 4 pi / 3 * R1^3        assuming spherical drops

V2 = 125 V1 = 4 pi / 3 * R2^3

V2 / V1 = 125 = R2^3 / R1^3

R2 / R1 = 125^1/3 = 5

V1 = k Q1 / R1      electric potential of 1 drop

V2 = k Q2 / R2

V2 / V1 = (Q2 / Q1) * ( R1 / R2) = 125 / 5 = 25

V2 = 25 V1 = 25 * 50 = 1250 V

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