Ques. 1AIPMT 2006
The core of a transformer is laminated because
- ratio of voltage in primary and secondary may be increased
- energy losses due to eddy currents may be minimised
- the weight of the transformer may be reduced
- rusting of the core may be prevented.
Answer
(2) energy losses due to eddy currents may be minimised
Solution
As per NCERT, the alternating magnetic flux induces eddy currents in the iron core, which heat it and waste energy.
∵ A laminated core (thin insulated sheets) breaks the paths of these currents, the eddy currents and the energy loss are minimised.
Answer: (2)