In a hydrogen atom the electron is moving in a circular orbit of radius 5.3×10⁻¹¹ m with a constant speed of 2.2×10⁶ m s⁻¹. The electric current formed due to the motion of the electron is .

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(2) 1.06 mA. Given: r = 5.3×10⁻¹¹ m, v = 2.2×10⁶ m s⁻¹, e = 1.6×10⁻¹⁹ C. Idea: the electron carries its charge e past any point of the orbit once per revolution, so I = e/T with T = (2π r)/v. T = (2π(5.3×10⁻¹¹))/(2.2×10⁶) = 1.51×10⁻¹⁶ s. I = (1.6×10⁻¹⁹)/(1.51×10⁻¹⁶) = 1.06×10⁻³ A. So the current is 1.06 mA.

In a hydrogen atom the electron is moving in a circular orbit of radius 5.3×10⁻¹¹ m with a constant speed of 2.2×10⁶ m s⁻¹. The electric current formed due to the motion of the electron is ______.

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