Electrons with an energy of 12 keV are shot in a TV tube and acted on by a magnetic field of B = 5.5 x 10-8 Wb/metre". The acceleration is

(a) 2.1 x 10 15m/sec2
(b) 6.32 x 10 14m/sec2
(c) 2.1 x 10 12m/sec2
(d) 6.32 x 10 12m/sec2

Ans: B

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