If a charged particle projected in a gravity-free room deflects, 

(a) there must be an electric field 

(b) there must be a magnetic field 

(c) both fields cannot be zero 

(d) both fields can be nonzero.

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1 Answers

The correct answer is (c) (d)

(c) both fields cannot be zero
(d) both fields can be nonzero.

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