(1)该实验的原理是
(2)若实验中当小灯泡正常发光时,电流表和电压表的示数如图乙所示,则小灯泡正常发光时的电阻是
(3)图丙是根据实验数据画出的通过小灯泡的电流I与它两端电压U之间的关系图像,由图像可知:通过小灯泡的电流I与它两端电压U不成正比,其原因是小灯泡灯丝的电阻受
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