(1)根据电路图,把图乙中所缺失的导线连接起来;(
(2)开关闭合前,滑动变阻器的滑片应滑到最
(3)粗略检查后闭合开关,发现电压表的指针出现反偏现象,可能出现这种情况的原因是
A.电压表量程选小了 B.电压表的正负接线柱接反了
(4)通过三次实验得出的实验数据如下表所示:
实验次数 | 1 | 2 | 3 |
电压U/V | 1.2 | 1.8 | 24 |
电流I/A | 0.2 | 0.3 | |
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