Question

In the xy-plane, the region y > 0 has a uniform magnetic field
B₁ˆk and the region y < 0 has another uniform magnetic field
B₂ ˆk. A positively charged particle is projected from the origin
along the positive y-axis with speed ????₀ = ???? m????⁻¹ at ???? = 0, as
shown in the figure. Neglect gravity in this problem. Let ???? = T
be the time when the particle crosses the x-axis from below for
the first time. If B₂ = 4B₁ , the average speed of the particle, in
ms⁻¹, along the x-axis in the time interval T is __________.

Answer 1

Answer:

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