Answer: A large electromagnetic coil is connected to a
Chapter 31, Problem 31.44(choose chapter or problem)
A large electromagnetic coil is connected to a 120-Hz ac source. The coil has resistance \(400 \ \Omega\), and at this source frequency the coil has inductive reactance \(250 \ \Omega\). (a) What is the inductance of the coil? (b) What must the rms voltage of the source be if the coil is to consume an average electrical power of 450 W?
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