Question

Cathode rays (stream of electrons) are moving between the poles of a magnet. Due
to the effect of magnetic field of magnet:
(1) Velocity of rays increases
(2) Velocity of rays decreases
(3) Rays deflected towards south pole
4) Rays deflected in upward direction and perpendicular to the plane of the paper​

Answer 1

Answer:

A

Explanation:

A cathods rays are a stream of electrons, when they are passed through magnets, due to magnetic field (of magnets) and velocuity of electrons, Lrents force (q

v

×

B

) acts upon them (in the figure its directions is into the page). As the force acts in a direction perpendicular to the initial direction of velocity, the velocity in the directions of force also increases so the net velocity (∣

V

net

∣

2

=

∣

V

in

∣

2

+∣

V

force

∣

2

)

also increases,

Option A is correct.