The excess pressure inside a soap bubble of radius $r$ is:
Show Hint
- $2T/r$
- $4T/r$
- $T/r$
- $8T/r$
The Correct Option is B
Solution and Explanation
Pressure difference across a curved liquid surface is due to surface tension.
Step 2: Analysis
A soap bubble has two surfaces (inner and outer). Each contributes $2T/r$ to the excess pressure.
Step 3: Conclusion
Total excess pressure $P = 2T/r + 2T/r = 4T/r$.
Final Answer: (B)
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