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in a velocity selector for ions, when the electric field is decreased by 50%, what change...

in a velocity selector for ions, when the electric field is decreased by 50%, what change in the magnetic field is necessary to select the same speed as before?
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Answer #1

In the velocity selector, the electric force is equal to magnetic force. We use this to find the required change in magnetic field as shown below

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in Veloci ty selectr Felecn'c Fmagatic E vB B VE if V is constamts BI B2 E-ESO E2 BL B2 32B 2 Sa magnehc Aeld show aloo be deoreave halve S0%

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