41. Perpendicular lines induce a uniform magnetic field induction 1 mT on two parallel conductors moves without friction bridge length of 20 cm. With the closure of the target containing the jumper, there is a current of 0.01 A. To determine the speed of the web. Circuit resistance 0.1 ohms.

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