Task 31237.
Copper conductor length l = 30 cm, and section S 0 = 10 mm ^ 2 made circular loop and placed in a transverse direction, decreases by law B = B0-Ct (B0 = 0,5 T, C = 0.05 T / c) a magnetic field. Determine induced emf and current in the circuit at time t = 4 c. The electrical resistivity of copper 1.7 x 10 -8 ohm * m
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