1.Two long, straight, parallel conductors carry equal currents and are spaced 1.0 meter apart. If the current in each conductor is doubled, the magnitude o the magnetic force acting between the conductors will be 1)Doubled 4) quadrupled. I chose 2 because I used the formula is F=ILB, so if I is doubled, then 2F=2ILB, F doubled as well, but the answer was 4), I didn’t use d=1 in that formula, so is there any other formula which includes d between two conductors? 2. Assume the magnetic field produced by the magnet and the electric field produced by plates X and Y remain constant. If the potential difference between the filament and the plate is increased, the force of the magnetic field on the electrons will 1) increase 2) decrease or 3) remain the same I don’t understand why potential difference V matters the force? And what does it mean by filament?