A:Hello!May I speak to Tom, please
B:Speaking. [16]
A:This is Bill. I called you yesterday, but youwere not at home.
B:[17]I need to prepare something for my tripto Shanghai.
A:ShanghaiThat’s where the World Exposition(世博会)is being held. How lucky you are!
B:So I am. [18]
A:I, have a birthday party next Friday. Wouldyou like to come
B: [19]My plane will take off next Wednesday.
A:What a pity(遗憾)that you can’t come![20]
B:Thank you very much. Bye!
A:Bye!
A．Who’s that
B．I’d like to, but I’m afraid I can’t.
C．I’m buying something for my aunt.
D．Have a good trip!
E．I was shopping at that time.
F．Who are you
G．What did you call me for

在如图所示的电路中，电源电压为6V，电阻R₁的阻值为10Ω，滑动变阻器R₂上标有“20Ω 1A”字样。求：

（1）将滑片P移至最左端后，闭合开关S，此时电流表的示数为多少?

（2）当滑片P从最左端向右移动过程中，小明同学发现：电流表的示数在增大。为此，他认为“当滑片位于中点时，R₂连入电路的电阻是它最大阻值的一半，所以通过R₂的电流也是滑片P位于最左端时电流值的一半”。

①请判断：小明的结论是                 的。（选填：“正确”或“错误”）

②请说明你判断的理由并计算出这时电压表的示数。