Permanent magnets used for DC motors because of:
A. High residual flux density
B. High coercivity
C. Both a and b
D. Retentivity
Answer:C
Permanent magnets used for DC motors because of:
A. High residual flux density B. High coercivity C. Both a and b D. Retentivity
Explanation: Permanent magnets are hard magnets with the area og B-H curve more and they are less used at core of the magnet and are used for DC servomotors as they have high residual flux density and high coercivity.