Question

1. An electron is moving
a) from west to east in the plane of the paper in a region where there is uniform magnetic field, directed inwards and perpendicular to the plane of the paper

b) from south to north in the plane of the paper in a region where there is uniform magnetic field, directed from west to east in the plane of the paper itself.
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Answer 1

Explanation:

1. b from South to north in a plane of a paper