The plugging gives the
The plugging gives the
For a D.C. shunt motor if the excitation is changed
For a D.C. shunt motor if the excitation is changed
For a D.C. shunt motor if the excitation is changed Read More »
Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors ?
Which one of the following is not necessarily the advantage of D.C. motors over A.C. motors ?
At the instant of starting when a D.C. motor is put on supply, it behaves like
At the instant of starting when a D.C. motor is put on supply, it behaves like
At the instant of starting when a D.C. motor is put on supply, it behaves like Read More »
The speed of a D.C. motor can be varied by varying
The speed of a D.C. motor can be varied by varying
The speed of a D.C. motor can be varied by varying Read More »
In case the back e.m.f. and the speed of a D.C. motor are doubled, the torque developed by the motor will
In case the back e.m.f. and the speed of a D.C. motor are doubled, the torque developed by the motor will
The speed of a D.C. shunt motor can be increased by
The speed of a D.C. shunt motor can be increased by
The speed of a D.C. shunt motor can be increased by Read More »
If I2 be the armature current, then speed of a D.C. shunt motor is
If I2 be the armature current, then speed of a D.C. shunt motor is
If I2 be the armature current, then speed of a D.C. shunt motor is Read More »
As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit
As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit