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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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Section
BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

What is the wavelength of an electron accelerated through a 30.0-kV potential, as in a TV tube?

To determine

The wavelength of an electron accelerated through a 30.0kV potential, as in a TV tube?

Explanation

Given info:

Potential difference is ΔV=30.0kV

Formula used:

Using De Broglie formula,

  λelectron=hmelectronveq.(1)

Conservation of mechanical energy,

  mvelectron22=eΔVeq.(2)

Calculation:

Solving for the speed of the electron using eq

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