The inductive reactance of coil is $\mathrm{R}$. If the inductance of a coil is doubled and frequency of a.c…
The inductive reactance of coil is $\mathrm{R}$. If the inductance of a coil is doubled and frequency of a.c. supply is also doubled then then new inductive reactance will
$2 R$
$8 R$
$\frac{\mathrm{R}}{2}$
$4 R$
Solution
Inductive reactance $=\mathrm{R}=2 \pi \mathrm{fL}$
If $\mathrm{L}$ and $\mathrm{f}$ both are doubled, the inductive reactance will become $4 R$