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(6分).如图所示,AB间的弹簧中间有可收缩的导线将滑动变阻器接入电路,R1为定...

(6分).如图所示,AB间的弹簧中间有可收缩的导线将滑动变阻器接入电路,R1为定值电阻。当闭合开关S,A板上受到的压力F增大时

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(1)电流表示数将       ,电压表的示数将     

(2)此装置可做为压力计使用,为使压力增大时,压力计的示数随指针向右摆动而增大,应把        (填“电流表”或“电压表”)改装为压力计。

 

 

(1)(每空1分,共2分)减少、增大   (2)(2分)电压表 【解析】
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