Q2) put ( v) or (x) for the following and correct the wrong : 1-the connection Delta-Delta is the choice for large L.V. transformer its remark is small load unbalanced can be tolerated. 2- Armature Cu...

Extracted text: Q2) put ( v) or (x) for the following and correct the wrong : 1-the connection Delta-Delta is the choice for large L.V. transformer its remark is small load unbalanced can be tolerated. 2- Armature Cu loss stray or rotational losses Copper losses Shunt field Cu Ics Series field Cu loss Hysteresis loss Losses in a d.c, machine Iron losses Eddy current loss Friction Mechanical losses Windage 3-For a loaded dc generator, Geometrical Neutral Axis will be shifted in the direction of the rotation. On the other hand, for a loaded dc motor, Geometrical Neutral Axis will be shifted in the direction opposite to that of the rotation 4-The approximate equivalent circuit referred to the secondary Rea Xe 5- The permittivity of dielectric materials are much smaller than the permeability of ferromagnetic materials it is more advantageous to use electromagnetic field as the medium for electromechanical energy conversion. 6- Voltage regulation =[(Vno load -Vfull load )/Vno load ] in single-phase step-up transformer 7-to reduce eddy current loss the yoke is built up of laminations sheet steel 8-The critical field circuit resistance should be larger than the field circuit resistance and the critical speed should be less than the speed of the rotation 9- The O.C.C. curve lies above internal characteristic curve. 10-To determine the internal and external load characteristics of a DC shunt generator the machine is allowed to build up its voltage before applying any external load then, it is gradually loaded with capacitive load and readings are taken at suitable intervals. 11- the most useful connections are (star-star), (delta-delta), (star-delta), (delta -star), (open- delta or T-T connection ) and (Scott connection or v connection). 12-if series winding amp-turns are adjusted so that, increase in load current causes decrease in terminal voltage then the generator is called to be under compounded. 13- Pm = wT= 2nT= 2nF+r 14-f = frequency of magnetic reversals = NP/120 where N is in r.p.s 15- In cumulative compound motor the flux produced by both the windings Psh=@r+ Pse