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In a given CRT, electrons are accelerated horizontally by 9.0 kV . They then pass through...

In a given CRT, electrons are accelerated horizontally by 9.0 kV . They then pass through a uniform electric field E for a distance of 3.3 cm , which deflects them upward so they travel 19 cm to the top of the screen, 13 cm above the center.

Estimate the value of E. Neglect the upward distance that electron moves while in the electric field.

Solutions

Expert Solution

Kinetic energy acquired by electron is

This velocity is horizontal,( say along x-axis)

Time taken by electron to travel the horizontal distance in the electric field region is

the electron enters the region between the plates of electric field E, and gets deflected thorgh a length of

( say hypotenuse of triangle) , with a vertical height of ( opposite side of triangle)

Velocity of electron in vertical direction is

Acceleration of electron in vertical direction is

Force on electron in electric field region is

Electric field in the region is

genius_generous answered 2 years ago
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