defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics

दो बुलबुलों (R₁>R₂) के उभयनिष्ठ पृष्ठ की वक्रता त्रिज्या ज्ञात कीजिए:

1
\( R = \frac{R_1 R_2}{R_1 + R_2} \)
2
\( R = \frac{2R_1 R_2}{R_1 - R_2} \)
3
\( R = \frac{R_1 R_2}{R_1 - R_2} \)
4
\( R = \frac{2R_1 R_2}{(R_1 + R_2)} \)
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