Solution to task 371 from Chertov´s for extramural stud

Solution to task 371 from Chertov´s for extramural stud

371. During the time t = 20 s, with a uniformly increasing current strength from zero to a certain maximum, the amount of heat Q = 4 kJ was released in the conductor with resistance R = 5 Ohm. Determine the rate of rise of the current, if the resistance of the conductor R = 5 ohms.