Eight charged water droplets each of radius 1 mm and charge 10 x 10-10 C coalesce to form a single drop. Calculate the
electric potential of the bigger drop.
(a) 3.6 x 104 v
(b) 5.2 x 10-12
(c) 8.5x 106 v
(d) 2.2×108 v
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Explanation:
A boy of 1.5 metre tall runs with a speed of 3 metre per second along a straight path under a lamp hanging at a height of 3 metre,then
A)The shadow of his head moves uniformly with a speed of 3 m/s.
B)The shadow of his head moves uniformly with a speed of 4 m/s.
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