Teaching TS DSC Secondary Grade (సెకండరీ గ్రేడ్ టీచర్) Teacher 2024 Mock Test General Science Physics Magnetism
Soft iron is used to manufacture electromagnets because:
1. It has a high permeability.
2. Its retentivity and coercivity are small.
3. Its retentivity and coercivity are high.
1
Only (1) is correct
2
Only (2) is correct
3
Both (1) and (2)
4
All are correct