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The core of a transformer is laminated t...

The core of a transformer is laminated to reduce

A

If both the assertion and reason are true and reason is correct explanation of the assertion .

B

If both the assertion and reason are true but reason is not a correct explanation of the assertion .

C

If the assertion is true but the reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
B
A step-down transformer converts electrical energy from a high voltage to one at a low voltage . Accordingly the current in the secondary will be larger than that in the primary . In order to produce less heat in the secondary , we use a wire of lesser resistance i.e. thick wire. We also know that when the plane of the armature is parallel to the lines of force of magnetic field, the rate of change of magnetic flux linked with it is maximum. Therefore the e.m.f , induced in the armature in this orientation is maximum .
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