Exploration on Strengthening the Theorem Thinking in the Teaching of Thevenin's Theorem
The third theorem,"equivalent resistance theorem",is introduced to prove the Thevenin's theorem in addition to superposition theorem and substitution theorem.This theorem can not only enlighten the thinking in the problem introduction,but also complement the full logical chain in the proving process of Thevenin's theorem,and also help to derive the applicable conditions of the Thevenin's theorem.Based on the strictness of logic deduction,a general method for obtaining the equivalent resistance parameters of white box circuit and black box circuit-internal power supply method is abstracted.This is helpful to extend the connotation of open circuit voltage/short circuit current method,and its name correspondence with"external power supply method"is also helpful to grasp the operation essentials of obtaining the equivalent resistance.
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