The value of back emf in a dc motor is maximum at a) no load b) full load c) half full load d) all load?
Answers
Answer:
no load
Explanation:
In DC motor also generator action takes place. Because of this generator action, the rotating conductor's cut the flux and emf induced in the conductor. This induced emf is called back emf.
Hence the value of back emf in a DC motor is maximum at -NO LOAD
Answer:
no load
Explanation:
About DC Motor:-
It is an electrical motor that converts direct current (DC) electrical energy into mechanical energy. They rely on the force produced by magnetic fields
Back emf and No load:-
When the armature of the DC motor rotates under the influence of driving torque, the armature of the conductors moves through a magnetic field including an emf in them. The induced emf is in the opposite direction to the applied voltage and is known as back emf.
A motor at no loads means it's running without a mechanical load connected to its rotor shaft. At no load, the motor will draw very low amount of current to supply the electrical core and copper loss and mechanical friction losses.
Hence the value of back emf in a DC motor is maximum at -NO LOAD