Discussion
The remanence of a magnetic material is the flux density remaining when
Answer: A
Correct answer: the applied field has been reduced to zero
Remanence is the flux density left in a material after it has been saturated and the applied field taken back to zero - the intercept of the hysteresis loop on the flux axis. It is what makes a permanent magnet permanent. Coercivity is the separate quantity: the reverse field needed to bring that remaining flux density to zero.
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