A) to increase velocity of rays
B) to deflect the rays towards S-pole
C) to deflect the rays towards N-pole
D) to deflect the rays perpendicular to the plane of paper, upwards
Correct Answer: D
Solution :
Key Idea: The magnetic lens of force emerge from north pole and enter south pole. Cathode rays are fast moving electrons and direction of current is taken opposite to direction of motion of electrons. In the given set up magnetic field is from north pole to south pole, direction of current is opposite to direction of cathode rays, hence from Flemings left hand rule, force acts perpendicular to plane of paper upwards.You need to login to perform this action.
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