The explanation of leakage current and induced current is listed below:
1. Leakage current refers to the small, unintended flow of electrical current that "leaks" through an electrical device or circuit when it should ideally be isolated or off. Leakage is caused by the AC part of the machine being charged due to defective or damaged parts, which is harmful to the human body;
2. The induced electric field is generated by the interaction between the device's own electromagnetic field and the metal casing. Since the induced electric field does not form a loop, it will not discharge to the human body.