Question

An electron travelling with a speed u along the positive x-axis enters into a region of magnetic field where B =B₀k(x > 0). It comes out of the region with speed v then – 

(A) v = u at y > 0 

(B) v = u at y < 0 

(C) v > u at y > 0 

(D) v > u at y < 0

Answer 1

Correct option (B) v = u at y < 0

Explanation:

So it will move towards y < 0 and speed remains constant.