5. An electron moves to the right, entering a region that has a uniform electric field...

5. An electron moves to the right, entering a region that has a uniform electric field directed at you. The direction of the force perceived by the electron is:

a. down

b. up

c. on the right

d. towards you

e. None of the above

Solutions

Expert Solution

Force on a moving charge due to magnetic field is given by: q x, where q is charge, is velocity vector and is magnetic field vector.

Since cross product is involved, direction of force is given by right hand thumb rule. According to right hand thumb rule, cross product x is given by the direction of your thumb, when your fingers curl from to .

Here, is towards right and is towards you. So,x is downwards(according to right hand rule).

Now, q is negative(charge on electron is negative). So, force = q x is towards up(option b).

genius_generous answered 1 year ago

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