When considering the voltage across and current through a resistor in an AC circuit, which of the...
Question:
When considering the voltage across and current through a resistor in an AC circuit, which of the following is true regarding their relative phase?
a. current leads voltage
b. voltage leads current
c. current and voltage are in phase
d. there is no phase in an AC circuit
Voltage-Current Phase Difference:
The phase difference between the voltage drop across an AC circuit and the current through it depends on the resistance, the capacitive reactance, and the inductive inductance. If the resistance, the inductive reactance, and the capacitive reactance of an AC circuit is {eq}\rm R, \ X_L, \ \text{and} \ \rm X_C {/eq} respectively, then the phase by which the voltage drop across the circuit leads the current through it is given by:
{eq}\displaystyle\hspace{8cm}\rm\phi = \tan^{-1}\left(\dfrac{X_L - X_C}{R}\right) {/eq}
Answer and Explanation: 1
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View this answerThe voltage drop across a purely resistive circuit and the current through it are always in phase with each other. The voltage across a pure resistor...
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Comprehend RLC circuits and their equations. Learn via an example, its total performance and the performance of its parts.
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