a.待测电阻
b.电压表V(量程1V、内阻)
c.电流表(量程2A、内阻)
d.电流表(量程30mA、内阻)
e.滑动变阻器(0~10Ω)
f.滑动变阻器(0~1kΩ)
g.电阻箱(0~999.9Ω)
h.电源(电动势3V、内阻不计)、开关,导线若干
(1)该同学分析实验器材、发现电压表的量程太小,需将该电压表改装成3V量程的电压表,应
(2)实验时,为了减小实验误差,且要求电表的示数从零开始调节,请将设计的电路画在图虚线框中,并标出所选用的相应的器材符号
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