Inductive and capacitive reactance play an important role in an a.c

PHYSICS · Multi-part · CBSE · Physics · Alternating Current · Alternating Current

Problem

Inductive and capacitive reactance play an important role in an a.c. circuit. (a) Define inductive reactance and capacitive reactance. State their SI units. (b) Show, from first principles, how the magnitude of each reactance varies with the frequency of the applied alternating emf. (c) A series circuit contains an inductor of

L=50\,\text{mH}

and a capacitor of

C=1\,\mu\text{F}

. Explain qualitatively how the magnitudes of the two reactances will change when the supply frequency is increased from

200\,\text{Hz}

2\,\text{kHz}

, and identify which element will offer the greater opposition to current at each frequency.

Related theory

AC Circuit Elements
AC Circuit Analysis
AC circuits with R, L, C
AC applied to a series LCR circuit
Alternating Current

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