在图所示的电路中,电源电压保持不变。闭合电键S,当滑动变阻器R2

在图所示的电路中,电源电压保持不变。闭合电键S,当滑动变阻器R2的滑片P向右移动时,电流表A1示数与电流表A2示数的和将 21 ,电压表V示数与电流表A1示数的比值将 22 。(均选填“变小”、“不变”或“变大”)

答案

变小;        (22)不变。解析:

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