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4. A length of 20-gauge copper wire (of diameter 0.8118 mm) is formed into a circular...

4. A length of 20-gauge copper wire (of diameter 0.8118 mm) is formed into a circular loop with a radius of 30.0 cm. A magnetic field perpendicular to the plane of the loop increases from zero to 13.0 mT in 0.28 s. Find the average electrical power dissipated in the process.

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