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Two air bubbles of radii 0.002 m and 0.0...

Two air bubbles of radii 0.002 m and 0.004 m of same liquid come together to form a single bubble under isothermal condition. Find the radius of the buble formed. Given surface tension of liquid is `0.072 Nm^(-1)`

A

6 mm with concave surface towards smaller bubble.

B

2 mm with concave surface towards bigger bubble

C

4 mm with concave surface towards smaller bubble.

D

4 mm with concave surface towards bigger bubble.

Text Solution

Verified by Experts

The correct Answer is:
C
`r=(r_(1)r_(2))/(r_(2)-r_(1))`
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