Electromagnets are made up of soft iron because soft iron has:
Correct answer: C. Low retentivity and low coercive force
- A. Low retentivity and high coercive force
- B. High retentivity and high coercive force
- C. Low retentivity and low coercive force
- D. High retentivity and low coercive force
Explanation
Electromagnets need to be switched on and off easily. Softiron is ideal because it has low retentivity (it doesn't staymagnetized) and low coercivity (it's easy to magnetize anddemagnetize), allowing for rapid control of the magnetic field.
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