Cooling (Loss Dissipation)

Hysteresis loss in a dc machine is _____ of rate of flow of air and _____ on frequency of _____

The hydroelectric plants in the industry are best suited with

If one of the phases of the supply breaks down, then the connected three phase induction motor

For squirrel cage and slip ring induction motor, cooling methods is efficient in

The iron losses in a saturated three phase alternator is lesser than the non-saturated three phase alternator.

In dc machine iron losses cause

For the given traction application using a dc series motor for a starting time ’t’ is applied. If this method is replaced by a series-parallel control, giving 50% time for each series and parallel. The saving in the starting energy of

If one of the phases of RYB supply gets broken, then the temperature rise of the induction motor

A peaky voltage supply is given to the 3 phase power transformer of the connection power system. These results into

A three phase induction motor is connected to the infinite bus operating at the normal conditions. There occurs an unbalancing in the supply, leading to

If two series motors are identically coupled. One is running as motor while other as generator. For this combination,the iron losses and frictional losses are found identical for