WBJEE 2021 Physics and Chemistry Solved Paper

Category II (Q31 to Q 35)

Carry 2 marks each and only one option is correct. In case of incorrect answer or any combination of more than one answer, ½ mark will be deducted

Question : 34 of 80

Marks: +1, -0

Under isothermal conditions, two soap bubbles of radii a and b coalesce to form a single bubble of radius c. If the external pressure is P, then surface tension of the bubbles is

P(c3−a3+b3)
4(a2+b2−c2)
P(c3−a3−b3)
4(a2+b2−c2)
P(c2+a2−b2)
4(a3+b3−c3)
P(c3+b3−c3)
4(a2+b2−c2)

Validate

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