Assertion: A laminated core is used in transf | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) Large eddy currents are produced in a non-laminated iron core of a transformer by the induced $emf$,as the resistance of a bulk iron core is very

Vedclass · Accepted Answer

If both the Assertion and Reason are incorrect.

Vedclass · Answer

(D) Large eddy currents are produced in a non-laminated iron core of a transformer by the induced $emf$,as the resistance of a bulk iron core is very small.By using thin iron sheets as a core,the electrical resistance is increased.Laminating the core substantially reduces the eddy currents.Eddy currents heat up the core of the transformer,leading to energy loss in the form of heat.Therefore,more eddy currents result in greater energy loss,which decreases the efficiency of the transformer.Since both the Assertion and the Reason are false,the correct option is $D$.

Assertion: $A$ laminated core is used in transformers to increase eddy currents.
Reason: The efficiency of a transformer increases with increase in eddy currents.

Similar Questions

$A$ metal sheet is placed in a magnetic field that changes from zero to maximum. If the figure shows the direction of eddy currents,then the direction of the magnetic field is:

The core of any transformer is laminated so as to

$A$ spherical insulating ball and a spherical metallic ball of the same size and mass are dropped from the same height. Choose the correct statement out of the following (Assume negligible air friction).

$A$ metallic ring connected to a rod oscillates freely like a pendulum. If now a magnetic field is applied in a horizontal direction so that the pendulum now swings through the field,the pendulum will

The use of eddy currents is done in the following,except:

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion: $A$ laminated core is used in transformers to increase eddy currents.Reason: The efficiency of a transformer increases with increase in eddy currents.