So how about a new metaphor? I always liked marbles rolling down an inclined plane, myself: Voltage = gravity, current = # of marbles/sec rolling down, resistance = width of the inclined plane. Induction is then easily modeled by showing that putting another inclined plane adjacent, but imagine that its marbles are all magnets that pull on the marbles on the first inclined plane... so when the marbles roll down the 2nd hill they 'pull along' the flow on the first hill, making it go faster than it would just due to gravity. or making them move at all if they're still. Hrm, analogy needs work. oh well.

---pj