Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Physics Fluids Surface tension

Excess pressure in a soap bubble of radius r is proportional to

1
1/r
2
\(\frac{1}{r^2}\)
3
r
4
More than one of the above
5
None of the above
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