An electron is initially moving at a speed of1720 m/s directly toward a long wir

Question

An electron is initially moving at a speed of1720 m/s directly toward a long wire that has2.00 A of current flowing through it. The electron is2.50 m away. What are the direction and amount of the forceexerted by the magnetic field on the electron?
____N, in the (opposite or same) direction as thecurrent
An electron is initially moving at a speed of1720 m/s directly toward a long wire that has2.00 A of current flowing through it. The electron is2.50 m away. What are the direction and amount of the forceexerted by the magnetic field on the electron?
____N, in the (opposite or same) direction as thecurrent

Explanation / Answer

An electron moving with a speed v =1720 m/s            current in the wire i = 2.00 A                 distance d = 2.50 m          magneticfield B = 0 i / 2 * d                                     = 4 *10-7 * 2.00 A / 2 * 2.50 m                                      = 1.6*10-7 T                magnetic Force exerted by magnetic field F = q vB                                                                                      = 1.6*10-19 C * 1720 m/s * 1.6*10-7 T                                                                                       = 4.40*10-23 N

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