Chapter 21, Problem 62GP

* EST Design a magnetometer Your friend needs to design an experiment that will allow her to measure the magnitude of the $\stackrel{\to }{\text{B}}$ field near a large permanent magnet. She has a small cod (50 turns, diameter 1.0 cm), a small motor that can spin at 300 revolutions per second, and an AC voltmeter that can measure voltage with 0.001-V precision. (a) Describe in detail the experimental setup (using this equipment) that will allow your friend to estimate the magnitude of the $\stackrel{\to }{\text{B}}$ field. (b) Estimate the smallest value of the $\stackrel{\to }{\text{B}}$ field magnitude that she will be able to measure indicate any assumptions that you made.