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Question

In the Bohr model of hydrogen atom, the electron is pictured to rotate in a circular orbit of radius 5×1011m, at a speed 2.2×106. What is the current associated with electron motion in mA?

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Solution

Speed = 2.2×106
radius = 5×1011m
time taken =2πrspeed
=2×π×5×10112.2×106=2×22×10×5×10117×22×106=107×1016
Current qt(1e=1.6×1019C)
=1.6×101910×1016×7=1.6100×103×7=112×105A=112×105×1000mA=1.12mA

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