(1)求氙离子进入加速电场时的速度大小;
(2)求Ⅱ区域电场强度E的大小;
(3)求Ⅱ区宽度L;
(4)保持上述条件不变,撤掉Ⅲ区中电场,并分为左右两部分,分别填充磁感应强度大小均为,方向相反且平行y轴的匀强磁场,氙离子仍能经D点进入Ⅱ区,求磁感应强度大小。
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2