The ratio between the root mean square (rms) of an applied voltage and the rms resultingfrom an alternating current is called
Correct answer: B. Impedance.
- A. Resistance.
- B. Impedance.
- C. Capacitance.
- D. Conductance.
Explanation
The correct answer is impedance. In an alternating current (AC) circuit, impedance is the term used to describe the ratio of the root mean square (rms) voltage to the rms current. Impedance extends the concept of resistance to AC circuits, accounting for both the resistive and reactive components of the circuit. Resistance only considers the opposition to direct current, ignoring the phase differences and reactive components present in AC circuits. Capacitance and conductance are not relevant to the definition of this ratio.
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About AC Through Resistor, Capacitor and Inductor
Alternating current through a resistor, capacitor and inductor involves phase relationships between voltage and current, reactance, impedance and energy transfer. A resistor keeps voltage and current in phase, while a capacitor and inductor produce opposite phase shifts, a distinction used in circuit diagrams and numerical calculations.
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