We're in the magnetic phenomena chapter, given the following details:
Find the current at I2.
F3 is the net force which is applied upon I3.
I've got this idea:
Draw the other 2 forces and extend all of the three forces so that F1 = 2d and F2 = d/2 and find out the net force using the cosinus theorem (C^2 = a^2 + b^2 - 2*a*b*cosø)
And then work out the value of the current...