How do I do 5, I’m not sure how to draw it out

the higher the current the higher the mag field around it the higher the influence on the compass

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

a is the best answer your welcome

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.