जब r(1) व r(2)त्रिज्या वाले साबुन के दो ...

जब `r_(1)` व `r_(2)`त्रिज्या वाले साबुन के दो बुलबुले मिलते है तो उभयनिष्ठ सतह की वक्रता त्रिज्या होती है `(r_(2) gt r_(1))` -

A

`r_(2)-r_(1)`

B

`(r_(2)-r_(1))/(r_(1)r_(2))`

C

`(r_(1)r_(2))/(r_(2)-r_(1))`

D

`r_(2)+r_(1)`

लिखित उत्तर

Verified by Experts

The correct Answer is:

C

`1/R=1/(r_(1))-1/(r_(2))=(r_(2)-r_(1))/(r_(1)r_(2)) rArr R = (r_(1)r_(2))/(r_(2)-r_(1))`

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