The air pressure inside a soap bubbles o...

The air pressure inside a soap bubbles of radius R exceeds the out side air pressure by 10 Pa. By how much will the pressure inside a bubble of radius 2R exceed the out side air pressure.

A

20 pa

B

40 pa

C

2.5 pa

D

5 pa

Verified by Experts

The correct Answer is:

D

`DeltaP `= Excess pressure
`P_1/P_2 =R_2/R_1 =(2R)/R implies P_2 =P_1/2=10/2=5 Pa`

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