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

Correct Answer: Decrease the reluctance of the magnetic path

Iron core is used in a transformer to carry flux from one winding to another winding, so there should be minimum opposition to flux passing through iron core. Hence, transformer function is to decrease the reluctance of magnetic path.
Bissoy MCQ
#Transformers #Transformer Construction (Core)

Related Questions

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 purpose of providing iron core in a step-up transformer is
A To provide coupling between primary and secondary
B To increase the magnitude of mutual flux
C To decrease the magnitude of magnetizing current
D To provide all above features
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
When secondary of a current transformer is open-circuited its iron core will be
A hot because of heavy iron losses taking place in it due to high flux density
B hot because primary will carry heavy current
C cool as there is no secondary current
D none of above will happen
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
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
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
A transformer core is laminated to
A reduce hysteresis loss
B reduce eddy current losses
C reduce copper losses
D reduce all above losses
Which of the following property is not necessarily desirable in the material for transformer core?
A Mechanical strength
B Low hysteresis loss
C High thermal conductivity
D High permeability

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