The materials suitable for making electromagnets should have
A. high retentivity and low coercivity
B. low retentivity and low coercivity
C. high retentivity and high coercivity
D. low retentivity and high coercivity
Answer:B
The materials suitable for making electromagnets should have
A. high retentivity and low coercivity B. low retentivity and low coercivity C. high retentivity and high coercivity D. low retentivity and high coercivity