A point charge of 6 μCis kept inside us spherical shell of radius 6cm. Calculate
the electric flux linked with surface of sphere.(i) when it's area is doubled (ii)
another charge of magnitude -6μC is placed at a distance (a) 3cm and (b) 8cm
from the centre of the sphere.
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The 5th term of an arithmetic sequence
is 5 and the sum of the first 5 terms is
55. What is its first term
(a) 15 (b
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