Description : Materials subjected to rapid reversal of magnetism should have (a) large area oiB-H loop (b) high permeability and low hysteresis loss (c) high co-ercivity and high retentivity (d) high co-ercivity and low density
Last Answer : (b) high permeability and low hysteresis loss
Description : The materials having low retentivity are suitable for making (a) weak magnets (b) temporary magnets (c) permanent magnets (d) none of the above
Last Answer : (b) temporary magnets
Description : The energy required to magnetize and demagnetize is called a) Saturation b) Retentivity c) Coercivity d) Hysteresis loss
Last Answer : d) Hysteresis loss
Last Answer : The retentivity (a property) of material is useful for the construction of permanent magnets.
Last Answer : The materials having low retentivity are suitable for making temporary magnets.
Description : The unit of retentivity is?
Last Answer : The unit of retentivity is weber/sq. m.
Description : Those materials are well suited for making permanent magnets which have _____ retentivity and _______ coercivity.
Last Answer : Those materials are well suited for making permanent magnets which have high retentivity and high coercivity.