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In order to measure the internal resistance r1 of a cell of emf E, a meter bridge of wire resistance R0= 50 Ω, a resistance R0/2, another cell of emf E/2 internal
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A text-book of electrical engineering;. We must first determine the cross-section ofthe magnetic path in the armature core, teeth, air-gap, pole-cores and yoke.We have diameter of armature internal diameter of armature (
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