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Q.

A soap bubble is slowly given a charge then

a) the radius increases slowly

b) the radius decreases slowly

c) the air pressure drops inside the bubble

d) 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 ΔP1R If radius increases then pressure decreases

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