Equation (31.9) says that v_ab= L di/dt (see Fig. 31.8a). Using Faraday€™s law, explain why point a is at higher potential than point b when i is in the direction shown in Fig. 31.8a and is increasing in magnitude. When i is counterclockwise and decreasing in magnitude, is v_ab= L di/dt still correct, or should it be v_ab= -L di/dt? Is v_ab= L di/dt still correct when i is clockwise and increasing or decreasing in magnitude? Explain.

Fig.31.8

Transcribed Image Text:

i k-UL-