In the x-y-plane, the region y>0 has a uniform magnetic field B1^k and the region y<0 has another uniform magnetic field B2^k. A positively charged particle is projected from the origin along the positive y-axis with speed Vo=πms−1 at t=0, as shown in the figure. Neglect gravity in this problem. Let t=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

In the x-y-plane, the region y>0 has a uniform magnetic field B1^k and

1.	In the x-y-plane, the region y>0 has a uniform magnetic field B1^k and the region y<0 has another uniform magnetic field B2^k. A positively charged particle is projected from the origin along the positive y-axis with speed Vo=πms−1 at t=0, as shown in the figure. Neglect gravity in this problem. Let t=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» In the x-y-plane, the region $y > 0$ has a uniform magnetic field $B_{1}^k$ and the region $y < 0$ has another uniform magnetic field $B_{2}^k$ . A positively charged particle is projected from the origin along the positive $y$ -axis with speed $V_{o} = π m s^{- 1}$ at $t = 0$ , as shown in the figure. Neglect gravity in this problem. Let $t = T$ be the time when the particle crosses the x-axis from below for the first time. If $B_{2} = 4 B_{1}$ , the average speed of the particle, in $m s^{- 1}$ , along the x-axis in the time interval $T$ is

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