This diagram illustrates an arrangement of a cathode ray from an electron gun and a bar magnet placed perpendicularly to the direction of the ray. will the ray bend downward or upward? Explain.
This is another unpopular question. Majority of the candidates that attempted this question could not get the caned concept(application of flemmings left hand rule) needed to tackle the question. However few candidates got it right as upward but failed in the explanation
The expected answers are:
Upward
The direction of motion of the charge is due to the force acting on it which is mutually perpendicular to the direction of the magnetic field and the moving charge.
