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A solenoid 30 cm long is made by winding 2000 loops of wire on an iron rod whose crosssectional area is 1.5 cm2. If the relative permeability of the iron is 600, what is the self-inductance of the solenoid? What average emf is induced in the solenoid as the current in it is decreased from 0.60 A to 0.10 A in a time of 0.030 s? |
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