(1)求磁感应强度的大小B;
(2)求Ⅲ区宽度d;
(3)Ⅳ区x轴上的电场方向沿x轴,电场强度E随时间t、位置坐标x的变化关系为,其中常系数,已知、k未知,取甲经过O点时。已知甲在Ⅳ区始终做匀速直线运动,设乙在Ⅳ区受到的电场力大小为F,甲、乙间距为Δx,求乙追上甲前F与Δx间的关系式(不要求写出Δx的取值范围)
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