1.

Eight equals charged tiny drops are combined to form a big drop. If the potential on each drop is 10V then potential of big drop will be -A. 40VB. 10VC. 30VD. 20V

Answer» Correct Answer - A
Given :
`8V_("tiny")=V_(big)`
`8(4)/(3)pir^3=4/3piR^3`
2r =R
`V_("tiny")=(Kq)/(r)`
`V_(big)=(Kxx8q)/(R)`
`V_(big)=(8Kq)/(2r)`
`V_(big)=4V_("tiny")`
`V_(big)=4xx10 implies 40V`


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