CUET Preparation Today
One student has to make an electromagnet using a coil of copper wire. He needs a ferromagnetic material to make its core. This core material should have |
Low permeability, low retentivity High permeability, high retentivity Low permeability, high retentivity High permeability, low retentivity |
High permeability, low retentivity |
The correct answer is Option (4) → High permeability, low retentivity |
