SSC JE Electrical Engineering 2017 Set 4 Paper

Question : 152 of 200

Marks: +1, -0

The main purpose of using core in a transformer is to ___

Decrease iron losses
Prevent eddy current loss
Eliminate magnetic hysteresis
Decrease reluctance of the common magnetic circuit

Solution:

Main purpose of using core in 9 transform is to decrease reluctance of the common magnetic.
Magnetic core in transformer is to increase and concentrate the magnetic flux that link the primary and secondary coil.
Cose is made of strips of iron material to reduce eddy current loss strips of iron has lower cross section area and higher resistance so eddy current loss reduce.

[TR∝{eI}/{A↓}]

P - resistivity of material.

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