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Questions  

The radius of first Bohr orbit in hydrogen atom is 0.5  and the speed of electron in this orbit is 2×106 m /s then the value of equivalent electric current will be

a
1μA
b
1 mA
c
0.5 mA
d
2 mA

detailed solution

Correct option is B

i=ef=ev/2πr i=1⋅6×10−192×1062×3⋅14×5×10−11≈1⋅mA

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