A.图甲中转动蹄形磁体时,静止的铝框(可绕轴自由转动)会随磁体同向转动 |
B.图乙中蹄形磁体靠近自由转动的铜盘时,铜盘转速不变 |
C.图丙中磁电式电流表中铝框骨架若用质量相等的塑料框替代效果相同 |
D.图丁中磁体从内壁光滑闭合竖直铝管的上端静止释放,磁体做自由落体运动 |
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