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What is Magnetic Effects of Electric Current about?

1. The magnetic field associated with a current in a long hollow copper pipe exists both inside and outside the pipe. 2. The magnetic field dB due to a small current element dl at a distance r is given by the Biot-Savart law as dB = (μ0i/4πr)(dl x r)/r2, where μ0 is the permeability of free space. 3. For a charge q moving in a circle of radius r with n revolutions per second, the magnetic field at the center is 2πnq/r × 10-7 N/amp/meter. [DOCUMENT]: 1184 Magnetic Effect of Current 4. If

Author

Willis Chekov

Language

EN