1. ssm In New England, the horizontal component of the earth’s magnetic field has a magnitude of 1.6 x 10-5 T. An electron is shot vertically straight up from the ground with a speed of 2.1 x 106 m/s. What is the magnitude of the acceleration caused by the magnetic force? Ignore the gravitational force acting on the electron.

Ignoring gravity then the sum of the forces is just due to the magnetic force.

 

 

Since  is vertical and  is horizontal, so  magnitude has a sin(90) which is 1.

 

Magnitudes of the sum of force equation becomes

 

Solving for a,

 

- sign simply changes the direction, so the magnitude of a is

 

 

Direction would be found from right hand rule, so consider the vectors

So as drawn the electron would be pushed out of the page.

 

 

 

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This page last updated on June 19, 2018