Electrical Machines Which of the following motor used in hair dryers? Cage induction motor. Shaded pole IM. Synchronous motors. Split phase IM. Cage induction motor. Shaded pole IM. Synchronous motors. Split phase IM. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a given torque, reducing divertor resistance of a DC series motor Decrease in speed demanding less armature current. Increase in speed but armature currnet remains the same. Decrease in speed but armature current remains the same. Increase in speed demanding more armature current. Decrease in speed demanding less armature current. Increase in speed but armature currnet remains the same. Decrease in speed but armature current remains the same. Increase in speed demanding more armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The air gap between the yoke and armature is dc machine is kept very small All of these to avoid over heating. to achieve a stronger magnetic field. to avoid locking of the armature. All of these to avoid over heating. to achieve a stronger magnetic field. to avoid locking of the armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To increase starting torque of a 3-phase slip ring induction motor, preferred method is to increase supply voltage rotor resistance supply frequency None of these supply voltage rotor resistance supply frequency None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a motor falls from 1100 r.p.m at no-load to 1050 r.p.m at rated load. The speed regulation of motor is 3.76%. 4.76%. 2.56 %. 2.57 %. 3.76%. 4.76%. 2.56 %. 2.57 %. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-phase transformer has its maximum efficiency at 60 percent of full load. At full load copper loss will be less than core loss. more than core loss. zero. equal to core loss. less than core loss. more than core loss. zero. equal to core loss. ANSWER DOWNLOAD EXAMIANS APP
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