“reactance(symbol: X; unit: ohm)”的概念、定义、翻译、参考文献-科学参考

reactance(symbol: X; unit: ohm)

Electronics and Electrical Engineering

The part of the total impedance of a circuit not due to pure resistance. It is the imaginary part of the complex impedance, Z, i.e.
$Z = R + j X$
where R is the resistance and j is equal to √−1. Reactance is due to the presence of capacitance or inductance in a circuit. The effect of reactance is to cause the voltage and current to become out of phase.
If an alternating voltage, given by
$V = V_{o} cosω t$
where ω is the angular frequency, is applied to a circuit containing capacitance the impedance of the circuit is given by
$Z = R - j / ω C$
where 1/ωC is the capacitive reactance, X_C, which decreases with frequency. The current leads the voltage: the phase angle is 90° in a purely capacitive circuit.
In a circuit containing inductance the impedance is given by
$Z = R + jω L$
where ωL is the inductive reactance, X_L, which increases with frequency. The current lags the voltage: the phase angle is 90° in a purely inductive circuit.

单词	reactance(symbol: X; unit: ohm)
释义	reactance(symbol: X; unit: ohm) Electronics and Electrical Engineering The part of the total impedance of a circuit not due to pure resistance. It is the imaginary part of the complex impedance, Z, i.e. $Z = R + j X$ where R is the resistance and j is equal to √−1. Reactance is due to the presence of capacitance or inductance in a circuit. The effect of reactance is to cause the voltage and current to become out of phase. If an alternating voltage, given by $V = V_{o} cosω t$ where ω is the angular frequency, is applied to a circuit containing capacitance the impedance of the circuit is given by $Z = R - j / ω C$ where 1/ωC is the capacitive reactance, X_C, which decreases with frequency. The current leads the voltage: the phase angle is 90° in a purely capacitive circuit. In a circuit containing inductance the impedance is given by $Z = R + jω L$ where ωL is the inductive reactance, X_L, which increases with frequency. The current lags the voltage: the phase angle is 90° in a purely inductive circuit.
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