Determine the diameter and length of the armature core for a 55kw, 110v, 1000rpm and 4 pole dc shunt generator. assume specific magnetic loading .5t, specific electric loading 1300 ampere turn, pope arc 70% of pole pitch and length of cor about 1.1 times the pole arc, allow 10 a for field current and voltage drop of 4v

An electric kettle is made out of stainless steel, weighs two pounds (when empty) and is equipped with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling