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Question Number 40817 by Necxx last updated on 27/Jul/18

An electric field of 2.66KV/m,and  a magnetic field of 1.20T,act on a  moving electron.Calculate the speed  of the electron if the resultant force  due to both fields is zero.

$${An}\:{electric}\:{field}\:{of}\:\mathrm{2}.\mathrm{66}{KV}/{m},{and} \\ $$$${a}\:{magnetic}\:{field}\:{of}\:\mathrm{1}.\mathrm{20}{T},{act}\:{on}\:{a} \\ $$$${moving}\:{electron}.{Calculate}\:{the}\:{speed} \\ $$$${of}\:{the}\:{electron}\:{if}\:{the}\:{resultant}\:{force} \\ $$$${due}\:{to}\:{both}\:{fields}\:{is}\:{zero}. \\ $$$$ \\ $$

Answered by tanmay.chaudhury50@gmail.com last updated on 28/Jul/18

qE=qvB  v=(E/B)

$${qE}={qvB} \\ $$$${v}=\frac{{E}}{{B}} \\ $$

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