Two coils are placed side by side. The current in one coil is switched on and then off. An induced emf in the second coil shows unequal spikes in its emf. What causes this unequal spikes?
2006-10-12 00:29:04 · 2 answers · asked by tamburo 1 in Science & Mathematics ➔ Physics
With no current flow in the primary coil, the magnetic field will collapse at a rate determined by various factors in its environment. When you apply voltage to the primary, the magnetic field will grow at varying rates, depending on the applied voltage. The two rates are only slightly related. Your car does not necessarily accelerate at the same rate when braking as when the engine is accelerating it.
2006-10-12 20:27:40 · answer #1 · answered by Frank N 7 · 0⤊ 0⤋
After switching on, you build-up a magnetic field in the second coil "from Zero" in one direction. When you turn off, then the magnetic field in the second coil needs to be reversed, not from zero, but from its existing field in the opposite direction.
2006-10-12 01:48:11 · answer #2 · answered by Marianna 6 · 0⤊ 0⤋