- #36
conscience
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- 36
Dale said:It is so simple that I don't think it needs an analogy. Even 9th graders can do it. Any analogy is going to be more complicated and less accurate than the real thing.
Your concern is valid and much appreciated .
I feel using analogy is a nice way while introducing something new . Every Introductory Physics texts vis a vis Halliday , University Physics use some or the other kind of analogy while starting with circuits .So I guess I will not be doing something totally absurd .
Most of the discussion in this thread has been related to my second question i.e how do you respond to a smart kid who questions that why should current be constant in the circuit . I neither intended nor mentioned anywhere that I was relating this question to the inclined plane analogy mentioned in the OP .Did I ? I was just looking for a simple explanation .
Dale said:Why do we need to do complicated analogies with balls bouncing down pegs at all? Why not just teach V=IR?
I have always intended to stick to V=IR .I assure you that I won't stretch the inclined plane analogy too far .Just a rough comparision , then V=IR all the way till the end .