现行高中《物理》第二册(必修加选修)第223面有这样一段话:“变压器的高压线圈匝数多而通过的电流小,可用较细的导线绕制;低压线圈匝数少而通过的电流大,应当用较粗的导线绕制”,学生常常误解为:线圈匝数多,用较细的导线绕制;线圈匝数少,用较粗导线 The current high school “Physics” Book 2 (Compulsory plus optional) on the 223nd side there is such a paragraph: "Transformer’s high voltage coil turns through a small number of current, can be used for thin wire winding; low voltage coil turns a few pass The current is large and should be wound with a thicker wire. Students often misunderstand the fact that the coil has many turns and is wound with a thinner wire; the number of turns is small, and the thicker wire is used.