26 The formula for calculating EMF, also state what the variables are.
27 L is the length of the conductor vBLv is the velocityB is the field strengthL is the length of the conductor
28 A permanent horseshoe magnet is mounted so that the magnetic field lines are vertical. If a student passes a straight wire between the poles and pulls it toward herself, the current flow through the wire is from left to right. Which is the N – pole of the magnet?