In air, a charged soap bubble of radius ' r ' is in equillibrium having inside and outside pressure equal. Then surface charge density ' \sigma ' on soap bubble is given by (E_{0}= permittivity of free space and {T}= surface tension of soap solution)

Auxiliary Nurse Midwife Exam 2020 Solved Paper

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In air, a charged soap bubble of radius ' r ' is in equillibrium having inside and outside pressure equal. Then surface charge density ' σ ' on soap bubble is given by (E0= permittivity of free space and T= surface tension of soap solution)

√‌
4TE0
r
‌
4TE0
r
‌
8TE0
r
√‌
8TE0
r

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