Question

We make armature drum of dc motor laminated so that

Answer 1

Answer:

We make armature drum of dc motor laminated so that the loss due to eddy currents can be reduced

Explanation:

When the core is rotated in a magnetic field, an EMF, is induced in the coils. This induced EMF causes current to flow, known as eddy current.

Eddy currents are a form of magnetic loss. The power lost due to the flow of eddy currents is called eddy current loss. These losses produce heat and reduce motor efficiency.

The armature drum of DC motor is laminated. These laminations are insulated from each other prevent the circular loss due to eddy currents.