(1096) Problem 7: In a mass spectrometer, a specific velocity can be selected fr
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(1096) Problem 7: In a mass spectrometer, a specific velocity can be selected from a distribution by injecting charged particles between a set of plates with a constant electric field between them and a magnetic field across them (perpendicular to the direction of particle travel). If the fields are tuned exactly right, only particles of a specific velocity will pass through this region undeflected. Consider such a velocity selector in a mass spectrometer with a 0.125 T magnetic field q) 50% Part (a) What electric field strength, in volts per meter, is needed to select a speed of 41 106 ms? 50% Part (b) What is the voltage, in kilovolts, between the plates if they are separated by 0.75 cm? Grade Summa Deductions Potential V- 384.375 0% 100% sin0 cotan asin acos0 atan acotan sinhO coshOtanh cotanh0 cos Submissions Attempts remaining: 3 (0 per attempt) detailed view END 0% 00% Degrees Radians VOI BACKSPACE | DEL | CLEAR Submit I give up! Hints: Feedback:Explanation / Answer
B. Voltage,
V= E d
= (Bv)*d
= (4.1*10^6* 0.125)* 0.75*10^-2
= 3843.75 V
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