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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 $$\mathrm{2}\:{plane}\:{parallel}\:{conducting}\:{plates}\:{are} \\ $$$${held}\:{horizontal},{one}\:{above}\:{the}\:{other}\:{in} \\ $$$${a}\:{vacuum}.{Electrons}\:{having}\:{a}\:{speed}\:{of} \\ $$$$\mathrm{6}×\mathrm{10}^{\mathrm{6}} {m}/{s}\:{and}\:{moves}\:{normally}\:{to}\:{the} \\ $$$${plates}\:{enter}\:{the}\:{region}\:{between}\:{them} \\ $$$${through}\:{a}\:{hole}\:{in}\:{the}\:{lower}\:{plate}\:{which} \\ $$$${is}\:{earthed}.{What}\:{potential}\:{must}\:{be} \\ $$$${applied}\:{to}\:{the}\:{other}\:{plate}\:{so}\:{that}\:{the}…

Question-52222

Question Number 52222 by Umar last updated on 04/Jan/19 Answered by peter frank last updated on 04/Jan/19 $$\left.{a}\right)\:\:\:{E}=\frac{{v}}{{d}} \\ $$$${E}=\frac{\mathrm{150}}{\mathrm{6}×\mathrm{10}^{−\mathrm{3}} }=\mathrm{25000}{V}/{m} \\ $$$${a}=\frac{{eE}}{{m}} \\ $$$${a}=\frac{\left(\mathrm{1}.\mathrm{6}×\mathrm{10}^{−\mathrm{19}}…

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 $${Two}\:{similar}\:{ball}\:{of}\:{mass} \\ $$$${m}\:{attached}\:{by}\:\:{silk}\:{thread} \\ $$$${of}\:{length}\:{a}\:\:{and}\:{carry} \\ $$$${similar}\:{charge}\:\:{q}.{assume}\:\theta\:{is} \\ $$$${small}\:{enough}\:{that} \\ $$$${tan}\theta\approx{sin}\theta\:{to}\:{this} \\ $$$${approximation},{show}\: \\ $$$${that}\:\:\:\:{X}=\left(\frac{{qa}}{\mathrm{2}\pi\varepsilon_{\mathrm{0}}…

Question-48405

Question Number 48405 by ajfour last updated on 23/Nov/18 Commented by tanmay.chaudhury50@gmail.com last updated on 23/Nov/18 $${now}\:{pls}\:{explain}\:… \\ $$$${when}\:{the}\:{ring}\:{is}\:{charged}\:{by}\:{charge}\:{Q}, \\ $$$${then}\:{why}\:{tension}\:{originate}… \\ $$$${what}\:{is}\:{the}\:{cause}\:{of}\:{origin}\:{of}\:{tension}… \\ $$$${Tension}\:{originate}\:{if}\:{you}\:{place}\:{another}…