The reactance of a coil depends upon:
Correct answer: A. Inductance of the coil
- A. Inductance of the coil
- B. Capacitance of the coil
- C. Thickness of the coil
- D. None of these
Explanation
The reactance of a coil, also known as inductive reactance, depends directly on the inductance of the coil. Inductance is a measure of the coil's ability to store energy in a magnetic field when current flows through it. In an AC circuit, the inductive reactance increases with the inductance of the coil. This relationship is described by the formula Xl = 2πfL, where Xl is the inductive reactance, f is the frequency of the AC signal, and L is the inductance of the coil. So, the inductance of the coil directly determines its reactance in an AC circuit.
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Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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