Electrical Machines
Armature resistance control method is also called as-----------?

 constant current control
 constant power control
 constant voltage control
 constant torque control

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Electrical Machines
A belt-driven cumulatively-compound dc generator is delivering power to the dc mains. If the Belt snaps then the machine will run as a

 cumulative compounded motor in opposite direction
 cumulative compounded motor in the same direction
 differentially compounded motor in the same direction
 differentially compounded motor in the opposite direction

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Electrical Machines
The speed of a DC series motor is

 Inversely proportional to the armature current.
 Proportional to the armature current.
 Proportional to field current.
 Proportional to the square of the armature current.

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