(2)在“测绘小灯泡的伏安特性曲线”实验中:
①如图丙所示,已经连接了一部分电路,请在答题纸上对应位置将电路连接完整
②合上开关后,测出9组Ⅰ、U值,在坐标系中描出各对应点,如图丁所示。请在答题纸对应位置的图中画出此小灯泡的伏安特性曲线
③与图丁中P点对应的状态,小灯泡灯丝阻值最接近
A.16.7Ω B.12.4Ω C.6.2Ω
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