(1)请你根据图a电路图,在未连好的实物图上用笔画线代替导线连接好电路.(待测电阻Rx阻值约10Ω)(
(2)接好电路后,闭合开关前,应将滑动变阻器的滑片移至
(3)老师巡回指导时,发现某一小组的实验电路图如图b所示,原来他们认为Rx两端的电压可以等于电源(两节串联干电池)电压3V减去电压表的示数.在老师指导下,他们闭合开关后实测了电源两端的电压,发现其值小于3V,说明他们的方案是
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