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Questions  

Magnetic field at the center (at nucleus) of the hydrogen like atoms (atomic number = z) due to the motion of electron in nth orbit is proportional to

a
n3z5
b
n4z
c
z2n3
d
z3n5

detailed solution

Correct option is D

Bn=μ0In2rn  or  Bn∝Inrn  or  B∝fnrn ∴ Bn∝vn/rnrn  Hence, B∝vnrn2 ∝(z/n)n2/z2 ∝z3n5

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