Physics - Electromagnetism - Lenz's law - Nature's Resistance to Change
Present: 'You push a North pole into a coil. Current flows and the coil becomes a magnet. Which pole does the coil present toward the approaching magnet?' (A) North (repelling), (B) South (attracting), (C) No pole, (D) Random. Answer: A! The coil creates a field that OPPOSES the change - it pushes b