In hydrogen atom, an electron is revolving in the orbit of radius $0.53\,{\mathop A\limits^o }$ with $6.6 \times {10^{15}}$ $rotations/second$. Magnetic field produced at the centre of the orbit is.......$wb/{m^2}$
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(c) $B = \frac{{{\mu _0}}}{{4\pi }} \cdot \frac{{2\pi (q\nu )}}{r}$
$ = {10^{ - 7}} \times \frac{{2 \times 3.14 \times (1.6 \times {{10}^{ - 19}} \times 6.6 \times {{10}^{15}})}}{{0.53 \times {{10}^{ - 10}}}}$$ = 12.5\,Wb/{m^2}$
$ = {10^{ - 7}} \times \frac{{2 \times 3.14 \times (1.6 \times {{10}^{ - 19}} \times 6.6 \times {{10}^{15}})}}{{0.53 \times {{10}^{ - 10}}}}$$ = 12.5\,Wb/{m^2}$
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