Two reasons for using soft iron as the material for electromagnets .

Options

A. low permeability and high receptivity
B. high permeability and low receptivity
C. low permeability and low receptivity
D. high permeability and high receptivity

Answer

B

Explanation

the magnetic permeability of soft iron is very high . So , when current flows through it , the electromagnet becomes very strong . On the other hand , as its receptivity is low , the magnetism disappears as soon as the current flow is stopped .