Example Refraction of lines of b at a Current sheet a thin conducting sheet carries a current density a(ampere/meter).(See Fig9-8) B Figure 9-8 Conducting sheet carrying a current density of z amperes per meter. Since V. B=0, the normal component of B is the same on both sides of the sheet. According to the circuital law, however, the tangential component is not conserved and a line of B is deflected in the direction shownExample: Refraction of Lines of B at a Current Sheet A thin conducting sheet carries a current density α(ampere / meter). (See Fig.9-8)