Solving a problem in physics section 61 point 90 electr

Solving a problem in physics section 61 point 90 electr

90. The coil length l = 50 cm, with a cross-section S = 40 cm 2 consists of one row of tightly abutting turns of wire with a diameter d = 0,60 mm. on the coil terminal voltage U = 12 V. Determine the strength of the current I in the coil, if during the time t = 0,40 ms in the wire is released quantity of heat equal to the energy of the magnetic field coil. The field inside the coil considered uniform.

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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)