Question

An inductor of $30\,mH$ is connected to a $220\,V$, $100\,Hz$ ac source. The inductive reactance is

• A. $10.58 \,\Omega$
• B. $12.64\, \Omega$
• C. $18.85\, \Omega$
• D. $22.67\, \Omega$

Answer 1

Answer: (C)

$18.85\, \Omega$

Answer 2

Here, $L = 30\, mH = 30 \times 10^{-3}\, H$ $V_{rms}=220\,V$, $\upsilon=100\,Hz$ Inductive reactance, $X_{L}= \omega L =2\pi\upsilon L$ $=2\times3.14\times100\times30\times10^{-3}$ $=18.85\,\Omega$