Mark the wrong option. Which of the following cause and effect behaviour in speed control is correct when field resistance is increased.

Related MCQs

• At a very low speed, increase in field resistance will                    
• Speed-power characteristic for Ward Leonard speed control method
• Speed control by Ward Leonard method, can give uniform speed variation
• motor. The maximum allowable current is 55 A and the minimum current is about 35 A. The armature resistance of the motor is 0.4 Ω. What will be the number of sections of starter resistance required?
• A starter is required for a 220-V shunt motor. The maximum allowable current is 55 A and the minimum current is about 35 A. The armature resistance of the motor is 0.4 Ω. What will be the number of sections of starter resistance required?
• γ is given as 1.585. Resistance at maximum allowable current is given equal to 4 Ω, what is the 5th step resistance?
• full load efficiency of 85% has armature resistance of 0.25 ohms. Calculate the value of starting resistance in ohms for a current 1.5 times of the full load current.
• For a 7.46 kW, 200 V dc shunt motor with full load efficiency of 85% has armature resistance of 0.25 ohms. Calculate the value of starting resistance in ohms for a current 1.5 times of the full load current.
• In shunt and compound motor starting the shunt field should be made on with full starting resistance in  
• In shunt and compound motor starting the shunt field should be made on with full starting resistance in