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Category: Electrostatics

A-solenoid-is-40cm-long-has-a-cross-sectional-area-of-8-0cm-2-and-is-wound-with-309-turns-of-wire-that-carries-a-current-of-1-2A-The-relative-permeability-of-the-iron-core-is-600-Compute-the-B-for-t

Question Number 63124 by necx1 last updated on 29/Jun/19 $${A}\:{solenoid}\:{is}\:\mathrm{40}{cm}\:{long},{has}\:{a}\:{cross} \\ $$$${sectional}\:{area}\:{of}\:\mathrm{8}.\mathrm{0}{cm}^{\mathrm{2}} \:{and}\:{is}\:{wound} \\ $$$${with}\:\mathrm{309}\:{turns}\:{of}\:{wire}\:{that}\:{carries}\:{a} \\ $$$${current}\:{of}\:\mathrm{1}.\mathrm{2}{A}.{The}\:{relative} \\ $$$${permeability}\:{of}\:{the}\:{iron}\:{core}\:{is}\:\mathrm{600}. \\ $$$${Compute}\:{the}\:\boldsymbol{{B}}\:{for}\:{the}\:{interior}\:{point} \\ $$$${and}\:{the}\:{flux}\:{through}\:{the}\:{solenoid}. \\ $$…

Question-59703

Question Number 59703 by ranusahu last updated on 13/May/19 Answered by ajfour last updated on 13/May/19 $$\mathrm{2kx}_{\mathrm{0}} =\frac{\mathrm{Qq}}{\mathrm{2}\pi^{\mathrm{2}} \epsilon_{\mathrm{0}} \mathrm{a}^{\mathrm{2}} } \\ $$$$\mathrm{x}_{\mathrm{0}} =\frac{\mathrm{Qq}}{\mathrm{4}\pi^{\mathrm{2}} \epsilon_{\mathrm{0}}…

Question-57783

Question Number 57783 by Tinkutara last updated on 11/Apr/19 Answered by ajfour last updated on 12/Apr/19 $$\mathrm{at}\:\mathrm{B}\:\mathrm{b}'\mathrm{coz}\:\:\frac{\partial\mathrm{V}}{\partial\mathrm{r}}\:\mathrm{seem}\:\mathrm{greatest}\:\mathrm{there}. \\ $$ Commented by Tinkutara last updated on…

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}…