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The magnetic compass is not useful for navigation near the magnetic poles because

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Important Questions on Magnetism

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 8 - Magnetism>Evaluation Test>Q 4

A short bar magnet is placed such that its north pole facing north forms a neutral point at T. Now, the magnet is rotated by 90° in the horizontal plane. If horizontal component of Earth's magnetic field is BH, then the net magnetic induction at T will be

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 8 - Magnetism>Evaluation Test>Q 5
The angle of dip at a place is δ. If dip is measured in a plane making an angle θ with the magnetic meridian, the apparent angle of dip δ1 will be equal to
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 8 - Magnetism>Evaluation Test>Q 6
A magnet 10 cm long with its poles concentrated at its ends is placed vertically with its north pole on the table. At a point10 cm due south of the magnetic north pole, a neutral point is obtained. If BH=0.5 gauss, then the pole strength of the magnet is approximately
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 8 - Magnetism>Evaluation Test>Q 7
The valence electron in the lithium atom is moving at a speed of 1.8×106 m s-1 in an orbit of radius 152Å. Neglecting the presence of other electrons in the atom, the magnetic moment of the valence electron is
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 8 - Magnetism>Evaluation Test>Q 8

Two bar magnets, each of magnetic moment M is placed as shown in the figure below. The resultant magnetic moment is

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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 8 - Magnetism>Evaluation Test>Q 9
Two short magnets with pole strengths of 100 ab ampere-cm and 64 ab ampere-cm are placed with their axes in the same vertical line, with similar poles facing each other. Each magnet has a length of 1 cm. When separation between the nearer poles is 1cm, the weight of upper magnet is supported by the repulsive force between the magnets. If g=1000 cm s-2, then the mass of upper magnet is
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 8 - Magnetism>Evaluation Test>Q 10
When magnetised, length of an iron bar
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MHT-CET TRIUMPH Physics Multiple Choice Questions Part - 1 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 8 - Magnetism>Evaluation Test>Q 11
A bar magnet is placed with its north pole towards geographic north. The neutral point will be