Question

An electron is travelling East through a magnetic field directed south. In which direction is the force on the electron?

Answer 1

into the Earth
I wrote it wrong.

Answer 2

F = q ( V x B )

Answer 3

cross multiplication.

Answer 4

ok so the direction of force would be downward?

Answer 5

Right. Do you know how to get the resultant direction of cross multiplication.

Answer 6

No I don't how

Answer 7

The most important thing is to know the arrangement of 2 vectors and which is first as V x b doesn't equal B x V.
the equation F= q (V x B )
Then draw them
and use the right hand rule to get the direction by starting from first one in the cross product which V.