Related Questions

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
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
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 laminated iron core has reduced eddy-current losses because
A More wire can be used with less D.C. resistance in coil
B The laminations are insulated from each other
C The magnetic flux is concentrated in the air gap of the core
D The laminations are stacked vertically
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
If 18 identical machines required 40 days to complete a job, how many fewer days would have been required to do the job if 6 additional machines of the same type had been used from the beginning?
A 10
B 13.33
C 16
D 26.66
Silicon steel is used in electrical machines because it has
A Low coercivity
B Low retentivity
C Low hysteresis loss
D High coercivity
Is universally used for windings of electrical machines because it is easily workable without any possibility of
A fracture
B Silver
C Steel
D Aluminium
E Copper
If it takes 4 days for 3 machines to do a certain job, it will take two machines to do the same job in -
A 6 days
B 4 days
C 5 days
D 2 days

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