The Figure Shows a Velocity Selector That Can Be Used

question 27

Multiple Choice

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 plate capacitor sets up an 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 the plates will allow particles of speed 5.0 × 10⁵ m/s to pass straight through without deflection?

• A) 600 V
• B) 1900 V
• C) 3800 V
• D) 190 V
• E) 94 V

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