1. A student makes a 4.0 ohm resistor by winding 3.9m of insulated eureka of diameter 0.78mm around a wooden former. calculate the resistivity of the eureka.
2. when the student connects the resistor across the terminals of the cell of e.m.f 1.56V resistance assuming that the ammeter has negligible resistance.
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Answer:
1) 4.9×10^-7(ohm.m)
2) 0.39A
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