The maximum strength of the earths magnetic fi eld is
Chapter , Problem 43(choose chapter or problem)
The maximum strength of the earths magnetic fi eld is about 6.9 3 1025 T near the south magnetic pole. In principle, this fi eld could be used with a rotating coil to generate 60.0-Hz ac electricity. What is the minimum number of turns (area per turn 5 0.022 m2 ) that the coil must have to produce an rms voltage of 120 V?
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