1:   The ultimate individual unit of magnetism in a magnet is called
Options:
1. north pole
2. dipole
3. south pole

Explanation:

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2:   A magnetic dipole of magnetic moment M is placed in a magnetic field of intensity B with its axis along the magnetic field. The work done in rotating it by 180 degrees is
Options:
1. - MB
2. +MB
3. zero
4. +2MB

Explanation:

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3:   A wire of length L meter carrying a current I is bent to form a circle. Its magnetic moment will be
Options:
1. IL/ pi
2. IL^2/4pi
3. I^2L^2/ 4 pi
4. none of these

Explanation:

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4:   Rate of change of torque t with deflection A is maximum for a magnet suspended freely in a uniform magnetic field of induction B, when angle A = --------- degrees
Options:
1. 0
2. 45
3. 60
4. 90

Explanation:

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5:   A circular coil has radius 4 cm and 50 turns, 2 Ampere of current is flowing through it. It is placed in the uniform magnetic field of 0.1 wb/square meter. Under normal condition, the work done is rotating the coil by 180 degrees will be
Options:
1. 0.1 J
2. 0.2 J
3. 0.4 J
4. 0.8 J

Explanation:

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6:   The radius of a circular coil is 4cm and hs 20 turns. 3 Ampere of current is flowing through it. It is kept in filed of 0.5 wb/square meter. The dipole moment of the coil will be ------------- ampere X m^2.
Options:
1. 0.3
2. 0.45
3. 0.6
4. 0.75

Explanation:

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7:   The horizontal intensity at any place on earth is H. A magnet is placed parallelly to this field in such a way that neutral point P is obtained at a distance of 10 m on its axis. If the magnet is turned such that the poles are changed. The net magnetic field at point P will be
Options:
1. H/2
2. H
3. 2H
4. 4H

Explanation:

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8:   A magnetic needle kept in a horizontally magnetic field gives a deflection of 45 degrees when another magnetic field normal to H is superimposed. The value of resultant field will be
Options:
1. H
2. root 2 X H
3. 2H
4. H^2

Explanation:

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9:   When the north pole of a magnet is placed in south and south pole in north. The neutral points are located on
Options:
1. magnetic axis
2. centre of magnet
3. perpendicular bisector of magnetic axis
4. north and south poles

Explanation:

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10:   A bar magnet is placed in north south direction. If its north pole is directed towards north. The points of zero intensity will be directed from the centre of magnet in
Options:
1. north and south
2. east and west
3. north east and south west
4. north west and south east

Explanation:

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