Question

The reactance of a coil when used in the domestic ac power supply (220 volt, 50 cycles) is 100 ohm. The self inductance of the coil is nearly

• A. 3.2 henry
• B. 0.32 henry
• C. 2.2 henry
• D. 0.22 henry

Answer 1

Answer: (B)

0.32 henry

Answer 2

Reactance $= 2\pi\nu L \Rightarrow 100\Omega = 2 \times \frac{22}{7} \times 50 \times L$

$\therefore L = 0.32henry$