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Calculate-the-magnetic-force-F-b-on-an-electron-with-velocity-v-20j-m-s-which-enters-a-magnetic-field-of-flux-density-B-0-6k-T-




Question Number 40815 by Necxx last updated on 27/Jul/18
Calculate the magnetic force,F_b  on  an electron with velocity,v=20j^� m/s  which enters a magnetic field of  flux density,B=0.6k^� T
$${Calculate}\:{the}\:{magnetic}\:{force},{F}_{{b}} \:{on} \\ $$$${an}\:{electron}\:{with}\:{velocity},{v}=\mathrm{20}\hat {{j}m}/{s} \\ $$$${which}\:{enters}\:{a}\:{magnetic}\:{field}\:{of} \\ $$$${flux}\:{density},{B}=\mathrm{0}.\mathrm{6}\hat {{k}T} \\ $$
Answered by tanmay.chaudhury50@gmail.com last updated on 28/Jul/18
F_b =qV^→ ×B^→      =(−e)20j^→ ×0.6k^→   =−12ei^→
$${F}_{{b}} ={q}\overset{\rightarrow} {{V}}×\overset{\rightarrow} {{B}} \\ $$$$\:\:\:=\left(−{e}\right)\mathrm{20}\overset{\rightarrow} {{j}}×\mathrm{0}.\mathrm{6}\overset{\rightarrow} {{k}} \\ $$$$=−\mathrm{12}{e}\overset{\rightarrow} {{i}} \\ $$
Commented by Necxx last updated on 28/Jul/18
Thank you sir
$${Thank}\:{you}\:{sir} \\ $$

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