At a location near the equator, the earth’s magnetic field is horizontal and points north. An electron is moving vertically upward from the ground. What is the direction of the magnetic force that acts on the electron?(a) North (b) East (c) South (d) West (e) The magnetic force is zero.

The electron will move east.

Explanation:

According to fleming's left hand rule for when the field and current are at right angles, the first finger represents the field's direction ( north to south), the second finger represents the current direction ( + to -) and the thumb represents the direction of motion..

See image below.

it's a b and

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle