In this article, loops that are partly electrostatic shielded are investigated. It is found that the line integral of electrostatic field around these loops is not zero. This is against the concept that the line integral of electrostatic field around any closed loop is zero. None zero electric field line integral means that there is electromotive force around the loop. However, when the loops are made of conductor wire, no electric current can be observed in the loops. A loop current driven by electrostatic field will break the law of energy conservation, so it is Expected and reasonable that we cannot observe a current in the loops.
