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Question Number 48165 by Umar last updated on 20/Nov/18

In a version of millikan experiment it is  a charged droplet of mass 1.8x10^(−15) kg  just remain stationary where the p.d   between the plates which are 12mm  apart is 150v. If the droplet suddenly  gain an extra electron. Find     (a) the acceleration of the droplet     (b) the p.d to bring it back to              stationary possition.  PLEASE HELP

$$\mathrm{In}\:\mathrm{a}\:\mathrm{version}\:\mathrm{of}\:\mathrm{millikan}\:\mathrm{experiment}\:\mathrm{it}\:\mathrm{is} \\ $$$$\mathrm{a}\:\mathrm{charged}\:\mathrm{droplet}\:\mathrm{of}\:\mathrm{mass}\:\mathrm{1}.\mathrm{8x10}^{−\mathrm{15}} \mathrm{kg} \\ $$$$\mathrm{just}\:\mathrm{remain}\:\mathrm{stationary}\:\mathrm{where}\:\mathrm{the}\:\mathrm{p}.\mathrm{d}\: \\ $$$$\mathrm{between}\:\mathrm{the}\:\mathrm{plates}\:\mathrm{which}\:\mathrm{are}\:\mathrm{12mm} \\ $$$$\mathrm{apart}\:\mathrm{is}\:\mathrm{150v}.\:\mathrm{If}\:\mathrm{the}\:\mathrm{droplet}\:\mathrm{suddenly} \\ $$$$\mathrm{gain}\:\mathrm{an}\:\mathrm{extra}\:\mathrm{electron}.\:\mathrm{Find} \\ $$$$\:\:\:\left(\mathrm{a}\right)\:\mathrm{the}\:\mathrm{acceleration}\:\mathrm{of}\:\mathrm{the}\:\mathrm{droplet} \\ $$$$\:\:\:\left(\mathrm{b}\right)\:\mathrm{the}\:\mathrm{p}.\mathrm{d}\:\mathrm{to}\:\mathrm{bring}\:\mathrm{it}\:\mathrm{back}\:\mathrm{to}\: \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\mathrm{stationary}\:\mathrm{possition}. \\ $$$$\boldsymbol{\mathrm{P}}\mathrm{LEASE}\:\mathrm{HELP} \\ $$

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