Problem

A Changing Magnetic Field. You are testing a new data-acquisition system. This system allo...

A Changing Magnetic Field. You are testing a new data-acquisition system. This system allows you to record a graph of the current in a circuit as a function of time. As part of the test, you are using a circuit made up of a 4.00-cm-radius, 500-turn coil of copper wire connected in series to a 600 Ω resistor. Copper has resistivity 1.72 × 10−8 Ω ∙ m, and the wire used for the coil has diameter 0.0300 mm. You place the coil on a table that is tilted 30.0° from the horizontal and that lies between the poles of an electromagnet. The electromagnet generates a vertically upward magnetic field that is zero for t < 0, equal to (0.120 T) × (1 − cos πt) for 0 ≤ t ≤ 1.00 s, and equal to 0.240 T for t > 1.00 s. (a) Draw the graph that should be produced by your data-acquisition system. (This is a full-featured system, so the graph will include labels and numerical values on its axes.) (b) If you were looking vertically downward at the coil, would the current be flowing clockwise or counterclockwise?

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