Question

A proton is fired with a speed of 1.1 ×106m/s through the parallel-plate capacitor shown in the figure(Figure 1). The capacitor's electric field is E⃗ =( 1.0 ×105V/m,down).

a. What is the strength of the magnetic field B⃗ that must be applied to allow the proton to pass through the capacitor with no change in speed or direction?

b. What is the magnetic field strength in the proton's reference frame?

c. What is the electric field strength in the proton's reference frame?

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