等效概念是高中物理的一种重要的思维方式 ,如合力与分力的等效替换、等效摆长、等效重力加速度、等效电路等 ,都采用了等效思想 ,这对于帮助学生理解物理概念、解决物理问题起到了积极的促进作用 .在变压器电路的教学中 ,教材给出了原、副线圈的电压比、电流比关系 ,学生在解 The concept of equivalence is an important way of thinking in high school physics, such as the equivalent replacement of force and force, equivalent pendulum length, equivalent gravitational acceleration, equivalent circuit, etc., all adopting the equivalent idea, which helps students Understanding the concept of physics and solving physical problems has played a positive role in promoting. In the teaching of transformer circuits, the textbook gives the relationship between the voltage ratio and the current ratio of the primary and secondary coils.