A positively-charged particle (alpha-particle) projected towards west is deflected towards north by a magnetic field. The direction of magnetic field is

 (a) towards south (b) towards east (c) downward (d) upward

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2 Answers

(d) upward
In accordance with Fleming's left-hand rule, the direction of magnetic field is vertically upward.

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The answer is (d) upward.

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