Related Questions

A transformer core is laminated to
A reduce hysteresis loss
B reduce eddy current losses
C reduce copper losses
D reduce all above losses
A ferrite core has less eddy current loss than an iron core because
A Ferrites have high resistance
B Ferrites are magnetic
C Ferrites have low permeability
D Ferrites have high hysteresis
In AC. circuits, laminated iron is invariably used in order to
A Reduce eddy current loss
B Increase heat radiation
C Make assembly cheap and easier
D Reduce circuit permeability
Which of the following losses are significantly reduced by laminating the core of a D.C. generator?
A Hysteresis losses
B Eddy current losses
C Copper losses
D Windage losses
Under conditions of equal reduced pressure and equal reduced temperature, substances are said to be in the 'corresponding states'. At equal reduced conditions i.e., at the corresponding state, the __________ of different gases are nearly the same.
A Compressibility
B Molecular weight
C Humidity
D None of these
Dermatologists tell us (P) that the skin (Q) is finely laminated coating (R) whose layered nature (S) has inspired comparisons with onions
A PQRS
B PRQS
C PRSQ
D PSRQ
In an iron cored coil the iron core is removed so that the coil becomes an air cored coil. The inductance of the coil will
A Increase
B Decrease
C Remain the same
D Initially increase and then decrease
Laminated cores, in electrical machines, are used to reduce
A Copper loss
B Eddy current loss
C Hysteresis loss
D All of the above
A laminated glass upon cracking
A Bursts into sharp edged fragments
B Bursts into granular pieces
C Sandwiched layer traps the fragments
D Breaks into the form of crystals
The armature of D.C. generator is laminated to
A reduce the bulk
B provide the bulk
C insulate the core
D reduce eddy current loss

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