First slide

Bohr Model of the Hydrogen atom.

Question

The radius of first Bohr orbit in hydrogen atom is 0.5 $Å$ and the speed of electron in this orbit is $2 \times 10^{6}$ m /s then the value of equivalent electric current will be

Easy

A

$1 μ A$
B

1 mA
C

0.5 mA
D

2 mA

Solution

$i = e f = e v / 2 π r i = \frac{(1 \cdot 6 \times 10^{- 19}) (2 \times 10^{6})}{2 \times 3 \cdot 14 \times (5 \times 10^{- 11})} \approx 1 \cdot m A$

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