12. The light bulb, the resistance which the hot R = 10 ohms, is connected via a throttle to the 12-volt battery. Inductor L = 2 TR, r = resistance of 1 ohm. After a time t after the lamp lights up when it starts visibly glow when voltage on it U = 6?

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