中学物理(包括初中物理或科学)中多处讲到接地问题.例如:静电场中的静电屏蔽,静电除尘;变压器中的电流互感器、电压互感器的铁心和副线圈都要接地;无线电发射天线一端伸向高处,另一端接地;安全用电常识中的家用电器的保护接地,三孔安全插座的接地问题等等.接地和地线是物理中经 There are multiple grounding problems in secondary school physics (including junior high school physics or science). For example: static shielding in electrostatic fields, electrostatic precipitators; current transformers in transformers, cores and secondary coils of voltage transformers must be grounded; radio emissions One end of the antenna extends to a high position and the other end is grounded; the protective grounding of the household appliances in the safe electricity common sense, the grounding of the three-hole safety socket, etc. The grounding and grounding are physical