Above curie temperature
A ferromagnetic substance becomes paramagnetic
A paramagnetic substance becomes diamagnetic
A diamagnetic substance becomes paramagnetic
A paramagnetic substance becomes ferromagnetic
A diamagnetic substance is brought near a strong magnet, then it is
Attracted by a magnet
Repelled by a magnet
Repelled by north pole and attracted by south pole
Attracted by north pole and repelled by south pole
A bar magnet having a magnetic moment of 2 × 10 4 JT -1 is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 × 10-4 T exists in the space. The work done in taking the magnet slowly from a direction parallel to the field to a direction 60o from the field is
0.6 J
12 J
6 J
2 J
If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is
Repelled by both the poles
Repelled by the north pole and attracted by the south pole
Attracted by the north pole and repelled by the south pole
Attracted by both the poles
A diamagnetic material in a magnetic field moves
Perpendicular to the field
From weaker to the stronger parts of the field
From stronger to the weaker parts of the field
In none of the above directions
Vertical component of earth's magnetic field is zero at a place where angle of dip is
45o
90o
0o
60o
A bar magnet of magnetic moment is placed in a magnetic field of induction . The torque exerted on it is
Rate of change of torque with deflection θ is maximum for a magnet suspended freely in a uniform magnetic field of induction B when
θ = 45o
θ = 60o
θ = 0o
θ = 90o
Two bar magnets having same geometry with magnetic moment M and 2 M, are firstly placed in such a way that their similar poles are on the same side, then its period of oscillation is T1. Now the polarity of one of the magnets is reversed the time period of oscillations becomes T2. Then
T1 < T2
T1 > T2
T1 = T2
A bar magnet has a magnetic moment of 2.5 JT-1 and is placed in a magnetic field of 0.2 parallel to anti parallel position relative to the field direction is
Zero
0.5 J
2.0 J
1 J
