Excessive sparking at the brushes may be caused due to
Excessive sparking at the brushes may be caused due to
Excessive sparking at the brushes may be caused due to Read More »
DC Motor MCQs
The greatest percentage of power loss in a d.c. motor is due to ………………..
The greatest percentage of power loss in a d.c. motor is due to ………………..
The greatest percentage of power loss in a d.c. motor is due to ……………….. Read More »
A motor takes a large current at starting because
A motor takes a large current at starting because
A motor takes a large current at starting because Read More »
The iron losses in a d.c. motor depends upon ………………..
The iron losses in a d.c. motor depends upon ………………..
The iron losses in a d.c. motor depends upon ……………….. Read More »
The various losses in a d.c. the machine, whether it is a motor or a generator, is categorized amplified into three groups as
The various losses in a d.c. the machine, whether it is a motor or a generator, is categorized amplified into three groups as
……………….. motor is most suitable for punch presses
……………….. motor is most suitable for punch presses
……………….. motor is most suitable for punch presses Read More »
A cumulatively compounded motor does not run at dangerous speed at light loads because of the presence of
A cumulatively compounded motor does not run at dangerous speed at light loads because of the presence of
The friction and windage losses in a d.c. motor depends upon ………………..
The friction and windage losses in a d.c. motor depends upon ………………..
The friction and windage losses in a d.c. motor depends upon ……………….. Read More »
A 220 V, 15 kW, 1000 RPM shunt Motor with an armature resistance of 0.25Ω, has a rated line current of 68 A and a rated field current of 2.2 A
Q. A 220 V, 15 kW, 1000 RPM shunt Motor with an armature resistance of 0.25Ω, has a rated line current of 68 A and a rated field current of 2.2 A. The change in field flux required to obtain a speed of 1600 RPM while drawing a line current of 52.8 A and a