| ASSERTION: A device for storing memory displays a hysteresis loop such as a ferromagnetic substance. |
| REASON: Ferromagnetic substances are those in which each individual atom has a non-zero magnetic moment. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: B
Solution :
Magnetization of a ferromagnetic depends not only on the magnetizing field, but also on the history of magnetization (i.e. how many cycles of magnetization it has undergone). This value of magnetization of a specimen is a record of memory of the cycles of magnetization it has undergone. The system displaying such a hysteresis loop can thus act as a device for strong memory.
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