6. In the case of a resistor, the voltage-current relationshipis given by Ohm's law, which states that the voltage acrossthe resistor is equal to the current through the resistormultiplied by the value of the resistance.译：就电阻来说，电压-电流的关系由欧姆定律给出，欧姆定律指出：电阻两端的电压等于通过电阻的电流乘以电阻值。7.Mathematically, this is expressed asu=iR(1-1A-1)where u=voltage, V; i=current, A; R=resistance, 译：欧姆定律的数学表达式：u=iR其中，u=电压，伏特；i=电流安培；R=电阻，欧姆
6. In the case of a resistor, the voltage-current relationship is given by Ohm’s law, which states that the voltage across the resistor is equal to the current through the resistor multiplied by the value of the resistance. 译：就电阻来说，电压-电流的关系由欧姆定律给出，欧姆定律 指出：电阻两端的电压等于通过电阻的电流乘以电阻值。 7. Mathematically, this is expressed as u=iR （1-1A-1） where u=voltage, V; i=current, A; R=resistance, Ω. 译：欧姆定律的数学表达式：u=iR 其中，u=电压，伏特；i =电流， 安培；R = 电阻，欧姆
8. The voltage across a pure inductor is defined by Faraday's law,which states that the voltage across the inductor is proportionalto the rate of change with times of the current through the inductor.译：纯电感的电压是由法拉第定律定义的，法拉第定律指出：电感两端的电压与流过电感的电流随时间的变化率成正比。di9. Thus we haveu=Ldtwhere di/dt-rate of change of current, A/ s; L=inductance, H.译：因此，可以得到，其中，didt=电流变化率，安培秒；L=感应系数，享利
8. The voltage across a pure inductor is defined by Faraday’s law, which states that the voltage across the inductor is proportional to the rate of change with times of the current through the inductor. 译：纯电感的电压是由法拉第定律定义的，法拉第定律指出：电感 两端的电压与流过电感的电流随时间的变化率成正比。 9. Thus we have where di/dt=rate of change of current, A/s; L=inductance, H. 译：因此，可以得到，其中，di/dt = 电流变化率，安培/秒；L = 感 应系数，享利。 t i u L d d =
1o. The voltage developed across a capacitor is proportionalto the electric charge q accumulating on the plates of thecapacitor.译：电容两端的电压与电容两个极板上积累的电荷q成正比11. Since the accumulation of charge may be expressed as thesummation, or integral, of the charge increments dq, we havethe equation1"idtu=where the capacitance C is the proportionality constantrelating voltage and charge.译：因为电荷的积累可表示为电荷增量dg的和或积分，因此得到的等式为，其中电容量C是与电压和电荷有关的比例常数
10. The voltage developed across a capacitor is proportional to the electric charge q accumulating on the plates of the capacitor. 译：电容两端的电压与电容两个极板上积累的电荷q 成正比. 11. Since the accumulation of charge may be expressed as the summation, or integral, of the charge increments dq, we have the equation where the capacitance C is the proportionality constant relating voltage and charge. 译：因为电荷的积累可表示为电荷增量dq的和或积分，因此得到 的等式为，其中电容量C是与电压和电荷有关的比例常数。 = i t C u d 1
12. By definition, current equals the rate of change of thecharge with time and is expressed as i=dq/dt。译：由定义可知，电流等于电荷随时间的变化率，可表示为i=dq/dt13.Thus an increment of charge dq is equal to the current multiplied by the corresponding time increment, or dq=i dt. Eq.(1-1A-3)may then be written asidtu=whereC=capacitance, F.译：因此电荷增量dq等于电流乘以相应的时间增量，或dq=idt，那么等式（1-1A-3)可写为，其中C=电容量，法拉
12. By definition, current equals the rate of change of the charge with time and is expressed as i=dq/dt。 译：由定义可知，电流等于电荷随时间的变化率，可表示为i= dq/dt。 13.Thus an increment of charge dq is equal to the current mul tiplied by the corresponding time increment, or dq=i dt. Eq.(1 -1A-3)may then be written as where C =capacitance, F. 译：因此电荷增量dq 等于电流乘以相应的时间增量，或dq = i dt， 那么等 式 (1-1A-3) 可写为，其中 C = 电容量，法拉。 = i t C u d 1
14.A summary of Eqs. (1) (2) and (4) for the three forms of passivecircuit element is given in Fig.1.译：由式(1)、(2)和(4)描述的三种无源电路元件如图1所示。15. Note that conventional current flow is used hence the current ineach element is shown in the direction of deceasing voltage译：注意，图中电流的参考方向为惯用的参考方向，因此流过每一个元件的电流与电压降的方向一致
14.A summary of Eqs. (1) (2) and (4) for the three forms of passive circuit element is given in Fig. 1. 译：由式(1)、(2) 和 (4)描述的三种无源电路元件如图1所示。 15. Note that conventional current flow is used hence the current in each element is shown in the direction of deceasing voltage. 译：注意，图中电流的参考方向为惯用的参考方向，因此流过 每一个元件的电流与电压降的方向一致