194799
यदि एक दण्ड चुम्बक के केन्द्र में एक छिद्र कर दिया जाये तो इसका चुम्बकीय आघूर्ण
1 बढ़ेगा
2 घटेगा
3 अपरिवर्तित रहेगा
4 उपरोक्त में से कोई नहीं
Explanation:
A bar magnet has a pole strength and a length. These two quantities determine what is called magnetic moment of the bar magnet. The magnetic moment is defined as pole strength multiplied by the seperation of the north and south poles of the bar moment. The seperation between the poles can be taken as the length of the bar magnet ( though the seperation of the poles is slightly less than the length). When a hole is cut in the bar magnet, the pole strength does not change, as the number of free poles at the ends do not change. Length does not change. So magnetic properties of the magnet should not change.
05. MAGNETISM and MATTER (HM)
194800
\(10\, A-m^2\) के चुम्बकीय आघूर्ण की दो छोटी चुम्बकों को अक्षीय स्थिति में, उनके केन्द्रों से \(0.1\,m \) दूरी पर रखा गया है। उनके बीच कार्यरत बल .....\(N\) होगा
1 \(0.6 \times {10^7}\)
2 \(0.06 \times {10^7}\)
3 \(0.6\)
4 \(0.06\)
Explanation:
दो छोटे चुम्बकों की अक्षीय स्थिति में \(F = \frac{{{\mu _0}}}{{4\pi }}\left( {\frac{{6MM'}}{{{d^4}}}} \right)\) \(\therefore \;F = {10^{ - 7}}\left( {\frac{{6 \times 10 \times 10}}{{{{\left( {0.1} \right)}^4}}}} \right) = 0.6\,N\)
05. MAGNETISM and MATTER (HM)
194801
चुम्बकीय बल रेखायें
1 हमेशा एक-दूसरे को काटती हैं
2 हमेशा बंद वक्र बनाती हैं
3 चुम्बक के ध्रुव से बहुत दूर इकट्ठी होने लगती हैं
4 निर्वात् में होकर नहीं गुजरती हैं
Explanation:
Magnetic lines of force are the imaginary lines in a magnetic field which show us the path along which a single notrh pole will move. They can never intersect. Otherwise at the junction point, the north pole will have two directions to move simultaenously. How can any particle move along two paths at a time? Isolated single monopoles do not exist. We always get a pair of north and south pole only. The lines of force start from a north pole and end at a south pole. Hence magnetic lines of force are always closed curves. They are crowded where the field is strong and are less and far from each other where the field is weak. Far away from the poles of a magnet, the field is very weak. Hence over there they won't tend to crowd, but remain away from each other. They can easily pass through vacuum.
05. MAGNETISM and MATTER (HM)
194887
पार्थिव चुम्बकत्व का ऊध्र्व घटक उस स्थान पर शून्य होता है, जहाँ नति कोण ......\(^o\) होता है
1 \(0\)
2 \(45\)
3 \(60\)
4 \(90\)
Explanation:
विषुवत रेखा पर नमन कोण शून्य हैं अत: पृथ्वी के चुम्बकीय क्षेत्र का ऊध्र्वाधर घटक भी शून्य होगा।
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05. MAGNETISM and MATTER (HM)
194799
यदि एक दण्ड चुम्बक के केन्द्र में एक छिद्र कर दिया जाये तो इसका चुम्बकीय आघूर्ण
1 बढ़ेगा
2 घटेगा
3 अपरिवर्तित रहेगा
4 उपरोक्त में से कोई नहीं
Explanation:
A bar magnet has a pole strength and a length. These two quantities determine what is called magnetic moment of the bar magnet. The magnetic moment is defined as pole strength multiplied by the seperation of the north and south poles of the bar moment. The seperation between the poles can be taken as the length of the bar magnet ( though the seperation of the poles is slightly less than the length). When a hole is cut in the bar magnet, the pole strength does not change, as the number of free poles at the ends do not change. Length does not change. So magnetic properties of the magnet should not change.
05. MAGNETISM and MATTER (HM)
194800
\(10\, A-m^2\) के चुम्बकीय आघूर्ण की दो छोटी चुम्बकों को अक्षीय स्थिति में, उनके केन्द्रों से \(0.1\,m \) दूरी पर रखा गया है। उनके बीच कार्यरत बल .....\(N\) होगा
1 \(0.6 \times {10^7}\)
2 \(0.06 \times {10^7}\)
3 \(0.6\)
4 \(0.06\)
Explanation:
दो छोटे चुम्बकों की अक्षीय स्थिति में \(F = \frac{{{\mu _0}}}{{4\pi }}\left( {\frac{{6MM'}}{{{d^4}}}} \right)\) \(\therefore \;F = {10^{ - 7}}\left( {\frac{{6 \times 10 \times 10}}{{{{\left( {0.1} \right)}^4}}}} \right) = 0.6\,N\)
05. MAGNETISM and MATTER (HM)
194801
चुम्बकीय बल रेखायें
1 हमेशा एक-दूसरे को काटती हैं
2 हमेशा बंद वक्र बनाती हैं
3 चुम्बक के ध्रुव से बहुत दूर इकट्ठी होने लगती हैं
4 निर्वात् में होकर नहीं गुजरती हैं
Explanation:
Magnetic lines of force are the imaginary lines in a magnetic field which show us the path along which a single notrh pole will move. They can never intersect. Otherwise at the junction point, the north pole will have two directions to move simultaenously. How can any particle move along two paths at a time? Isolated single monopoles do not exist. We always get a pair of north and south pole only. The lines of force start from a north pole and end at a south pole. Hence magnetic lines of force are always closed curves. They are crowded where the field is strong and are less and far from each other where the field is weak. Far away from the poles of a magnet, the field is very weak. Hence over there they won't tend to crowd, but remain away from each other. They can easily pass through vacuum.
05. MAGNETISM and MATTER (HM)
194887
पार्थिव चुम्बकत्व का ऊध्र्व घटक उस स्थान पर शून्य होता है, जहाँ नति कोण ......\(^o\) होता है
1 \(0\)
2 \(45\)
3 \(60\)
4 \(90\)
Explanation:
विषुवत रेखा पर नमन कोण शून्य हैं अत: पृथ्वी के चुम्बकीय क्षेत्र का ऊध्र्वाधर घटक भी शून्य होगा।
194799
यदि एक दण्ड चुम्बक के केन्द्र में एक छिद्र कर दिया जाये तो इसका चुम्बकीय आघूर्ण
1 बढ़ेगा
2 घटेगा
3 अपरिवर्तित रहेगा
4 उपरोक्त में से कोई नहीं
Explanation:
A bar magnet has a pole strength and a length. These two quantities determine what is called magnetic moment of the bar magnet. The magnetic moment is defined as pole strength multiplied by the seperation of the north and south poles of the bar moment. The seperation between the poles can be taken as the length of the bar magnet ( though the seperation of the poles is slightly less than the length). When a hole is cut in the bar magnet, the pole strength does not change, as the number of free poles at the ends do not change. Length does not change. So magnetic properties of the magnet should not change.
05. MAGNETISM and MATTER (HM)
194800
\(10\, A-m^2\) के चुम्बकीय आघूर्ण की दो छोटी चुम्बकों को अक्षीय स्थिति में, उनके केन्द्रों से \(0.1\,m \) दूरी पर रखा गया है। उनके बीच कार्यरत बल .....\(N\) होगा
1 \(0.6 \times {10^7}\)
2 \(0.06 \times {10^7}\)
3 \(0.6\)
4 \(0.06\)
Explanation:
दो छोटे चुम्बकों की अक्षीय स्थिति में \(F = \frac{{{\mu _0}}}{{4\pi }}\left( {\frac{{6MM'}}{{{d^4}}}} \right)\) \(\therefore \;F = {10^{ - 7}}\left( {\frac{{6 \times 10 \times 10}}{{{{\left( {0.1} \right)}^4}}}} \right) = 0.6\,N\)
05. MAGNETISM and MATTER (HM)
194801
चुम्बकीय बल रेखायें
1 हमेशा एक-दूसरे को काटती हैं
2 हमेशा बंद वक्र बनाती हैं
3 चुम्बक के ध्रुव से बहुत दूर इकट्ठी होने लगती हैं
4 निर्वात् में होकर नहीं गुजरती हैं
Explanation:
Magnetic lines of force are the imaginary lines in a magnetic field which show us the path along which a single notrh pole will move. They can never intersect. Otherwise at the junction point, the north pole will have two directions to move simultaenously. How can any particle move along two paths at a time? Isolated single monopoles do not exist. We always get a pair of north and south pole only. The lines of force start from a north pole and end at a south pole. Hence magnetic lines of force are always closed curves. They are crowded where the field is strong and are less and far from each other where the field is weak. Far away from the poles of a magnet, the field is very weak. Hence over there they won't tend to crowd, but remain away from each other. They can easily pass through vacuum.
05. MAGNETISM and MATTER (HM)
194887
पार्थिव चुम्बकत्व का ऊध्र्व घटक उस स्थान पर शून्य होता है, जहाँ नति कोण ......\(^o\) होता है
1 \(0\)
2 \(45\)
3 \(60\)
4 \(90\)
Explanation:
विषुवत रेखा पर नमन कोण शून्य हैं अत: पृथ्वी के चुम्बकीय क्षेत्र का ऊध्र्वाधर घटक भी शून्य होगा।
194799
यदि एक दण्ड चुम्बक के केन्द्र में एक छिद्र कर दिया जाये तो इसका चुम्बकीय आघूर्ण
1 बढ़ेगा
2 घटेगा
3 अपरिवर्तित रहेगा
4 उपरोक्त में से कोई नहीं
Explanation:
A bar magnet has a pole strength and a length. These two quantities determine what is called magnetic moment of the bar magnet. The magnetic moment is defined as pole strength multiplied by the seperation of the north and south poles of the bar moment. The seperation between the poles can be taken as the length of the bar magnet ( though the seperation of the poles is slightly less than the length). When a hole is cut in the bar magnet, the pole strength does not change, as the number of free poles at the ends do not change. Length does not change. So magnetic properties of the magnet should not change.
05. MAGNETISM and MATTER (HM)
194800
\(10\, A-m^2\) के चुम्बकीय आघूर्ण की दो छोटी चुम्बकों को अक्षीय स्थिति में, उनके केन्द्रों से \(0.1\,m \) दूरी पर रखा गया है। उनके बीच कार्यरत बल .....\(N\) होगा
1 \(0.6 \times {10^7}\)
2 \(0.06 \times {10^7}\)
3 \(0.6\)
4 \(0.06\)
Explanation:
दो छोटे चुम्बकों की अक्षीय स्थिति में \(F = \frac{{{\mu _0}}}{{4\pi }}\left( {\frac{{6MM'}}{{{d^4}}}} \right)\) \(\therefore \;F = {10^{ - 7}}\left( {\frac{{6 \times 10 \times 10}}{{{{\left( {0.1} \right)}^4}}}} \right) = 0.6\,N\)
05. MAGNETISM and MATTER (HM)
194801
चुम्बकीय बल रेखायें
1 हमेशा एक-दूसरे को काटती हैं
2 हमेशा बंद वक्र बनाती हैं
3 चुम्बक के ध्रुव से बहुत दूर इकट्ठी होने लगती हैं
4 निर्वात् में होकर नहीं गुजरती हैं
Explanation:
Magnetic lines of force are the imaginary lines in a magnetic field which show us the path along which a single notrh pole will move. They can never intersect. Otherwise at the junction point, the north pole will have two directions to move simultaenously. How can any particle move along two paths at a time? Isolated single monopoles do not exist. We always get a pair of north and south pole only. The lines of force start from a north pole and end at a south pole. Hence magnetic lines of force are always closed curves. They are crowded where the field is strong and are less and far from each other where the field is weak. Far away from the poles of a magnet, the field is very weak. Hence over there they won't tend to crowd, but remain away from each other. They can easily pass through vacuum.
05. MAGNETISM and MATTER (HM)
194887
पार्थिव चुम्बकत्व का ऊध्र्व घटक उस स्थान पर शून्य होता है, जहाँ नति कोण ......\(^o\) होता है
1 \(0\)
2 \(45\)
3 \(60\)
4 \(90\)
Explanation:
विषुवत रेखा पर नमन कोण शून्य हैं अत: पृथ्वी के चुम्बकीय क्षेत्र का ऊध्र्वाधर घटक भी शून्य होगा।