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प्रश्न
Permanent magnets are the substances having the property of ______.
विकल्प
- ferromagnetism at room temperature for a long period of time.
- paramagnetism at room temperature for a long period of time.
- anti ferromagnetism at room temperature for a long period of time.
- diamagnetism at room temperature for a long period of time.
MCQ
रिक्त स्थान भरें
उत्तर
Permanent magnets are the substances having the property of ferromagnetism at room temperature for a long period of time.
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