(1)闭合S后,要使杆静止在水平导轨上,滑动变阻器接入电路的阻值至少为多少?
(2)将导轨右侧抬起角,若要杆保持静止在导轨上,滑动变阻器接入电路的阻值最大为多少?
(3)将导轨右侧抬起任意角,若静止在导轨上时滑动变阻器接入电路的阻值的最大值为,求与之间满足的关系式
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