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中学物理实验室中时常用到的电压表与电流表,实质电压表与电流表是由满偏电流小的电流表表头改装而成的.本文讨论实际电路中电流表与电压表的改装及扩程问题.
The voltmeter and ammeter which are often used in the physics laboratory of middle school are the real voltmeter and ammeter which are converted from ammeter with ampere partial current.The thesis discusses the modification and expansion of ammeter and voltmeter in the actual circuit.