Eddy currents can be reduced by
A
using coil of high resistance
B
winding the coil on a soft iron core
C
creating holes in the metal plates
D
using coil of low resistance
Verified Correct Answer: C.
Physical Principles & Numerical Solution
This method interrupts the flow of eddy currents by increasing the resistance in the path of the currents, thereby reducing their magnitude.
Other Options:
A. Using a high-resistance coil: This does not directly affect eddy currents in conductive materials.
B. Winding the coil on a soft iron core can enhance magnetic effects and may not reduce eddy currents.
D. Using low resistance coil: This would not help reduce eddy currents; it could potentially increase the flow of currents.
Source: Myschool Past Questions Archive (Record #35353)