An electron moving horizontally from left to right across the page enters a uniform E⃗ field that points toward the top of the page.

A) Choose the correct direction of the electric force exerted by the field on the electron.

Choices: Up , right , down , left

B) Choose the correct direction of the acceleration of the electron.

Choices: Up , right , down , left

C) What motion in the gravitational field is similar to the motion of the electron?

Choices: the motion of the object that is thrown vertically , the motion of the object that is thrown horizontally , the motion of the object that is thrown 45 degrees above the horizontal , none of these

a)  DOWN , b) DOWN , c) 4) True. nome

Explanation:

A) When a charge enters an electric field it is subjected to an electric force

         F = q E

The electron charge is negative q = -e

        F = - e E

As the electric field goes up the force on the electron is directed DOWN

B) Acceleration is given by Newton's second law

          F = m a

Where we see that net force and acceleration have the same meaning

Consequently the acceleration goes DOWN

c) The electron has a movement with constant velocity on the x-axis and a movement with acceleration on the y-axis, this is a projectile-like movement

Let's review the three options given

1) False. We have a two-dimensional parabolic movement

2) False. We have a two-dimensional movement

3) False. This case the electro is launched with zero degrees, but it is the same type of movement

4) True. Because all of the above are false, our movement is parabolic

d. platinum would have the greatest temperature increase because it has the lowest specific heat.