Question

The inductive reactance of a coil is 2500 $\Omega$ . On increasing it’s self-inductance to three times, the new inductive reactance will be:

• A. 7500$\Omega$
• B. 2500$\Omega$
• C. 1225$\Omega$
• D. zero

Answer 1

The correct option is A 7500$\Omega$

$X_L=\omega L$
So, $2500=\omega L$
When L is increased to 3L
then $X_L=\omega \left(3L\right)$
$=3\omega L$
$=3\left(2500\right)$
$=7500\Omega$