When the electric voltage and current are measured with voltmeter and ammeter, certain measuring errors could occur due to the inherent resistance.
在实际使用电压表、电流表测量电压、电流时，因测量仪表的内阻会产生一定的测量误差。
This current will cause errors in low current measuring or in high impedance circuits.
在测量小电流或高阻电路时，该电流会引起误差。
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