Electrical Machines
In a loaded DC motor, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will

 deteriorate and the speed rises.
 improve and the speed falls.
 deteriorate and the speed falls.
 improve and the speed rises.

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

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