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Q.

In hydrogen atom, the electron is making 5×1015 revolutions per second. If the radius of the orbit is 0.8×10−10m, then the magnetic field produced at the centre of the orbit is 

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a

1.57 T  

b

3.14 T

c

4.71 T

d

6.28 T

answer is D.

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Detailed Solution

B=μ0fe2r

B=4π×10-7×5×1015×1.6×10-192×0.8×10-10

B=62.8×10-1T

B=6.28 T

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