figure 15 figure 2 shows the result of a laboratory test performed ove
Figure 15. Figure 2 shows the result of a laboratory test performed over a free-air metallic conductor of 0.2" diameter and a length of 16". The applied current was 90 A(rms). The controlled ambient temperature in the lab was 20 C, and the conductor's resistance for that temperature was found to be 5.6143 x 10* Ohms. a. What kind of metal is this? b. Determine the equivalent h (convection factor) assuming the free-air model given in class is precise enough. с.c. Determine the time constant t. d. What current should be applied to the conductor such that it reaches an equilibrium temperature of 100 C?
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