EXAMIANS
Pole changing methods are suitable only for ___________ type induction motor.
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In a 3 - Φ wound rotor induction motor the short circuit gear is used to short circuit the
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In synchronous motor the torque is proportional to
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Which of the following motor is used in grinders?
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Compensating windings are used in DC generators
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A commutator with a diameter of 50 cm rotating at 1000 rpm. For a brush width of 1.5 cm, find the time of commutation in ms.
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A 220 V, DC shunt motor is operating at a speed of 1440 rpm. The armature resistance is 1.0 Ω and armature current is 10 A. of the excitation of the machine is reduced by 10%, the extra resistance to be put in the armature circuit to maintain the same speed and torque will be
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Which of the following is the largest conversion device?
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In a three phase slip-ring induction motor, brushes are connected to
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In a DC generator in case the brushes are moved so as to bring them in magnetic neutral axis, then, there will be
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