EXAMIANS
In salient pole synchronous machine, maximum power occurs at a load angle of
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What is the effect of armature reaction ?
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which of the following type of brush and their application is/are correct
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A 10 kW, 230 V, dc shunt machine has four terminals brought out through four leads. For this machine
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The armature resistance of the dc motor is generally of the range
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The direction of generated emf in the armature coil of a DC machine is 1. the same as that of the current in a generator 2. the same as that of the current in a motor 3. opposite to that of the current in a generator 4. opposite to that of the current in a motor From these, the correct answer is
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A compound dc generator is delivering full load current at a terminal voltage of 230 V. Its series-field winding gets short circuited. If its terminal voltage 1. becomes more than 230 V, it is overcompounded generator 2. becomes more than 230 V, it is differentially compounded generator 3. becomes less than 230 V, it is overcompounded generator 4. becomes less than 230 V, it is differentially compounded generator 5. becomes less than 230 V, it is level compounded generator From these, the correct answer is
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What will be the maximum power factor of an induction motor for dispersion coefficient of 0.05?
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If Ke is eddy current constant, Kf is form factor, f is supply frequency, Bm maximum flux density in core of transformer, the expression of eddy current loss in transformer, is given by
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A 4 pole 50 Hz induction motor is running at 1470 rpm. Find the speed of stator magnetic field with respect to rotor?
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