In a concentric cable capacitor the
diameters of the inner and outer
cylinders are 3 and 10 mm respectively.
It er for insulation is 3, find its capaci-
tance per metre.
(a) 100 pF (6) 110 pF
(c) 118.8 pF (d) 138.8 pF
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Answer:
(d) 138.8
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