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प्रश्न
The BH curve for a ferromagnetic material is shown in the figure. The material is placed inside a long solenoid which contains 1000 turns/cm. The current that should be passed in the solenonid to demagnetize the ferromagnet completely is
विकल्प
1.00 m A
1.25 mA
1.50 mA
1.75 mA
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उत्तर
1.50 mA
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