The discussion revolves around the resistance of a wire (conductor) and how it changes when the diameter is halved. Participants are examining the relationship between the diameter, cross-sectional area, and resistance in the context of electrical properties.
The discussion is actively exploring different interpretations of the problem, particularly regarding the definitions of surface area and cross-sectional area. Some participants have provided clarifications about the relationships involved, but there is no explicit consensus on the correct answer to the original question.
There is some confusion regarding the term "dimidiated" and its implications for the problem. Participants are also referencing textbook definitions and relationships that may not be universally understood.
I think it is. Only if you consider pi to affect thatDr. Courtney said:Is the surface area really proportional to r^2?
Can you tell me the difference. in my book it says Resistance is in disproportional to the cross section of the resistance.Dr. Courtney said:Are you confusing surface area and cross sectional area?
Surface area means area of the entire surface of the conductor. Cross sectional area is the area "through" which the current flows. Resistance is inversely proportional to the cross sectional area of the conductor.prishila said:Can you tell me the difference. in my book it says Resistance is in disproportional to the cross section of the resistance.
I understand. But how can this affect the solution of my exercise?cnh1995 said:Surface area means area of the entire surface of the conductor. Cross sectional area is the area "through" which the current flows. Resistance is inversely proportional to the cross sectional area of the conductor.
If "dimidiated" means halved, I agree that the answer is D.prishila said:I understand. But how can this affect the solution of my exercise?