an electron at pointing in the figure has a speed v of 1.41 E 6 m/s find (a )the magnitude and direction of the magnetic field that will cause the electron to flow the semicircular path from A to B and( b) the time required for the electron to move from A to B.
a) At A, magnetic force should be towards right. Thus from Fleming's left hand rule magnetic field should be inwards (into a paper).
The electron experiences centripetal force under the action of magnetic field. Hence
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