A closely wound coil of `100` turns and area of cross-section `1cm^(2)` has a coefficient of self-induction `1 mH`. The magnetic induction in the centre of the core of the coil when a current of `2A` flows in it, will be
A. `0.022 Wbm^(-2)`
B. `0.4 Wbm^(-2)`
C. `0.8 Wbm^(-2)`
D. `1Wbm^(-2)`
