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Category: Electrostatics

2-plane-parallel-conducting-plates-are-held-horizontal-one-above-the-other-in-a-vacuum-Electrons-having-a-speed-of-6-10-6-m-s-and-moves-normally-to-the-plates-enter-the-region-between-them-through-a-h

Question Number 55431 by necx1 last updated on 24/Feb/19 2planeparallelconductingplatesareheldhorizontal,oneabovetheotherinavacuum.Electronshavingaspeedof6×106m/sandmovesnormallytotheplatesentertheregionbetweenthemthroughaholeinthelowerplatewhichisearthed.Whatpotentialmustbe$${applied}\:{to}\:{the}\:{other}\:{plate}\:{so}\:{that}\:{the}…

Two-similar-ball-of-mass-m-attached-by-silk-thread-of-length-a-and-carry-similar-charge-q-assume-is-small-enough-that-tan-sin-to-this-approximation-show-that-X-qa-2pi-0-mg-1-3-w

Question Number 50994 by peter frank last updated on 23/Dec/18 Twosimilarballofmassmattachedbysilkthreadoflengthaandcarrysimilarchargeq.assumeθissmallenoughthattanθsinθtothisapproximation,show$${that}\:\:\:\:{X}=\left(\frac{{qa}}{\mathrm{2}\pi\varepsilon_{\mathrm{0}}…