Faraday’s law of electromagnetic induction; Skills for analyzing processes involving...

Faraday’s law of electromagnetic induction; Skills for analyzing processes involving electromagnetic induction; Changing field magnitude and induced emf; Changing area and induced emf Stimulating the brain

A bar magnet induces a current in an N-turn coil as the magnet moves closer to it (Figure P18.24). The coil’s radius is R cm, and the average induced emf across the bulb during the time interval is e V. (a) Make a list of the physical quantities that you can determine using this information; (b) Is the direction of the induced current from lead a to b, or from b to a? Explain.