Question: An electron with velocity u = (3ax + 12ay 4az) X 105m/s experiences no net force at a point in a magnetic field B

An electron with velocity u = (3ax + 12ay – 4az) X 105m/s experiences no net force at a point in a magnetic field B = 10ax + 20ay + 30az mWb/m2. Find E at that point.

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