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    				| 1. | Which of the following conditions are desired in the core of an electromagnet?(a) High permeability and High retentivity(b) Low permeability and High retentivity(c) High permeability and Low retentivity(d) Low permeability and Low retentivity | 
| Answer» Right choice is (c) High permeability and Low retentivity Easy explanation: Ferromagnetic materials have high permeability and low retentivity. Due to these properties, the core of electromagnets is made up of ferromagnetic materials. | |