A soap bubble is slowly given a charge then a) the radius increases slowlyb) the radius decreases slowlyc) the air pressure drops inside the bubbled) the air pressure inside the bubble increases
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a
a, c are correct
b
a, d are correct
c
b, c are correct
d
b, d are correct
answer is A.
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Detailed Solution
Radius of bubble increases due to repulsion of charges. ΔP=2TR and ΔP∝1R If radius increases then pressure decreases