EXAMIANS
Air core transformer as compared to iron core transformer, has
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Armature reaction effect is more in which of the following methods?
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The armature shaft must be able to with stand
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A bipolar dc machine with interpoles has a main-pole flux of ф per pole and an interpole flux of Фᵢ per pole. The yoke of the machine is devide into four quadrants by the main-pole axis and The commutation axis. The flux-distribution in the quadrants will be
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Two transformers with identical rating, are designed with flux densities of 1.2 and 1.4 Wb / m2 respectively. The weight of first transformer per kVA is
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Capacitor fitted with ceiling / table fans is of the value of
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A 100 KVA transformer is operating at 60 Hz, 240 V supply. The same transformer is operating at 50 Hz, 200 V supply. The new rating is
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A DC series motor is accidentally connected to single phase ac supply voltage. The torque produced will be
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The interpoles in dc machines have a tapering shape in order to
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In a transformer zero voltage regulation is achieved at a load power factor which is
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