(1)初速度的的值;
(2)如果右侧磁场不是匀强的,而是满足(k为某个固定的正常数),当线框全部进入磁场时恰好静止,求的值;
(3)如果刚性矩形线框为超导线框,质量为m,自感为L,磁场大小为B的匀强磁场.现让超导线框沿x方向以初速进入匀强磁场区域,当线框全部进入磁场时恰好静止.(假定线框始终保持超导状态)求.
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