To get the speed of DC motor below the normal speed without wastage of electrical energy we use                                      

Related MCQs

• To get the speed of DC motor below the normal speed without wastage of electrical energy we use  
• A 50 Hz, 4poles, a single phase induction motor is rotating in the clockwise direction at a speed of 1425 rpm. The slip of motor in the direction of rotation & opposite direction of the motor will be respectively.
• An induction motor when started on load, it does not accelerate up to full speed but runs at 1/7th of the rated speed. The motor is said to be  
• An induction motor when started on load, it does not accelerate up to full speed but runs at 1/7th of the rated speed. The motor is said to be                    
• The speed torque of the differential compound dc motor is shown below. What conclusions can be made?
• An electric motor is having constant output power. So, motor will have a torque speed characteristic  
• An 8-pole, 3-phase, 50 Hz induction motor is operating at a speed of 720 rpm. The frequency of the rotor current of the motor in Hz is  
• An electric motor is having constant output power. So, motor will have a torque speed characteristic                                                
• An 8-pole, 3-phase, 50 Hz induction motor is operating at a speed of 720 rpm. The frequency of the rotor current of the motor in Hz is                      
• A 2-pole, 3-phase,              Hz induction motor is operating at a speed of 550 rpm. The frequency of the rotor current of the motor in Hz is 2.