Related Questions

Which of the following properties is not necessarily desirable for the material for transformer core?
A Low hysteresis loss
B High permeability
C High thermal conductivity
D Adequate mechanical strength
Material used for construction of transformer core is usually
A wood
B copper
C aluminium
D silicon steel
The permeability of a core material is an indication of the ability of the material to establish a magnetic field.
A True
B False
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
Which of the following is not a desirable property of a refrigerant?
A High risibility with oil
B Low boiling point
C Good electrical conductor
D Large latent heat
The applied voltage of a certain transformer is increased by 50%, while the frequency is reduced by 50%. The maximum core flux density will
A become three times
B become 1.5 times
C become half
D remian the same
What is the purpose of providing an iron core in a transformer?
A Provide support to windings
B Reduce hysteresis loss
C Decrease the reluctance of the magnetic path
D Reduce eddy current losses
The purpose of providing an iron core in a transformer is to
A provide support to windings
B reduce hysteresis loss
C decrease the reluctance of the magnetic path
D reduce eddy current losses
The size of a transformer core will depend on
A frequency
B area of the core
C flux density of the core material
D (A) and (B) both
The core used in high frequency transformer is usually
A copper core
B cost iron core
C air core
D mild steel core

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