Question

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

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

Answer 1

Answer: (C)

$18.85\Omega$

Hence ,$L=30mH=30\times {10}^{-3}H$

$V_{rms}=220,\upsilon =100Hz$

Inductive reactance,

$X_L=2\pi \upsilon L=2\times 3.14\times 100\times 30\times {10}^{-3}=18.85\Omega$