(1)当滑动变阻器R₃的滑片位于最右端,S₁闭合,、断开时,电压表V₁的示数为12V。请画出等效电路
(2)将滑动变阻器的滑片调至某位置,同时闭合开关、、,此时通过R₃的电流为1.6A,电流表A示数为2A。请画出等效电路
(3)仅闭合开关S₁,将滑动变阻器的滑片从最右端移至某处,电压表V₁示数变化了4V。请画出等效电路
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