railway RRB JE (CBT I + CBT II) Mock Test 2024 Electromagnetic Theory Magnetostatics Magnetostatic Field
Consider a circular coil of radius 'r' and carrying current 'I' as shown in fig.
The magnet flux density at the center of the coil is given as -
1
\(\rm \frac{{{\mu _0}I}}{{2r}}\)
2
\(\rm \frac{{{\mu _0}I}}{{2\pi r}}\)
3
\(\rm \frac{{{\mu _0}{I^2}}}{{2\pi r}}\)
4
\(\rm \frac{{{\mu _0}{I^2}r}}{{2\pi }}\)