13- please help me with my physics HW The figure shows a velocity selector that

Question

13- please help me with my physics HW

The figure shows a velocity selector that can be used to measure the speed of a charged particle. A beam of particles is directed along the axis of the instrument. A parallel electric field E, which is oriented perpendicular to a uniform magnetic field B. If the plates are separated by 2.0 mm and the value of the magnetic field is 0.60 T, what voltage between will allow particles of speed 5.0 Times 10^5 m/s to pass straight through without deflection? 3800V 190V 600V 1900V 94V

Explanation / Answer

By qvBsin = qE
=>qvBsin = qV/d
=>V = vdB {as sin90* = 1}
=>V = 5 x 10^5 x 2 x 10^-3 x 0.60
=>V = 600 Volt

Ans C) - 600 V

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