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(1)请用笔画线代替导线,将图甲中的电路正确连接,导线不要交叉
(2)闭合开关移动滑片,发现小灯泡不发光,电压表Vl示数接近电源电压,电压表V2无示数(接线均完好,导线无断路),故障原因可能是
(3)排除故障后,闭合开关移动滑片,电压表V2示数如图乙所示为
(4)继续移动滑片,当电压表Vl示数为5V时,小灯泡正常发光,此时小灯泡的电阻为
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同类型试题
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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
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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
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