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Question

In Bohr's model of hydrogen atom, the electron circulates round the nucleus in a path of radius 5×1011m at a frequency of 6.8×1015 revolutions per second. The value of magnetic induction at the centre of the orbit is :

A
12.27T
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B
10.8T
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C
13.2T
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D
13.6T
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Solution

The correct option is A 13.6T

|B| =μ0i2r

I=dqdt

= qf

= 1.6×1019×6.8×1015

=10.88×104

|B|=4π×107×10.88×1042×5×1011

=13.6T

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