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In this figure, the arrow represents a beam of electrons moving in the plane of paper from left to right.  How would the beam be deflected, relative to the paper, if (i)  A is a north pole and B is a south pole?  (ii)  A is a positively charged plate and B is a negatively charged plate?


Asked by Topperlearning User 4th June 2014, 1:23 PM
Answered by Expert

(i)  The beam will deflect outwards, perpendicular to the plane of paper (by Fleming's left hand rule) if A is the north pole and B is the south pole.

(ii)  The beam will deflect upwards in the plane of paper (i.e., towards the positive plate) if A is the positively charged plate and B is the negatively charged plate.

Answered by Expert 4th June 2014, 3:23 PM
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