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
Correct Answer: Option C
C. creating holes in the metal plates
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
Correct Answer: Option C
C. creating holes in the metal plates
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