(1)用笔画线代替导线,将图甲所示电路补充完整
(2)排除故障后进行实验,当滑动变阻器的滑片位于某一位置时,电流表示数如图乙所示,为
(3)由图丙可知,小灯泡正常发光时的电阻为
(4)从图象还可以看出,小灯泡灯丝的电阻随电压的图象是一条曲线,从物理学角度分析,造成这一现象的原因是
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