the armature of a 230 V shunt motor has a resistance of 0.18 ohms if the armature current is not to exit 76 a calculate (a) the resistance that must be inserted in series with the armature at the instant of starting​ (b) the value to Wich to the resistance can be reduced when the armature accelerate until Ec is 168 volt (c) the armature current at the instant of starting if no resistance is inserted in the armature circuit. (assume a 2 volt at the brushes)
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In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina. what should be the radius of curvature of the cornea such that the image of an object 40.0 cm from the cornea’s vertex is focused on the retina?
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the armature of a 230 V shunt motor has a resistance of 0.18 ohms if the armature current is not to...
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