An electron enter a region of uniform magnetic field with velocity (40i+36j) Km/s. If
ܤሬ⃗ = (0.75 ݇ሬ⃗) T. calculate the magnetic force on the electron.
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We know that the magnetic force on an electron is
arrow above F = q (arrow above v x arrow above B)
= 1.6 x 10^-19 x [30 (-j) + 27 j] x 5/18
= - 1.33 x 10^-19j N
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