A dip needle vibrates in a vertical plane perpendicular to magnetic meridian. The time of vibration is found to be 25, the same needle is then allowed to vibrate in the horizontal plane and the […]
The workdone in turning a magnet of magnetic moment M by an angle of 90⁰ from the magnetic meridian is n times the corresponding work done to turn it through an angle of 60⁰. The […]
On heating a ferromagnetic substance above curie temperature
Options
(a) becomes paramagnetic (b) becomes diamagnetic (c) remains ferromagnetic with constant magnetic susceptibility (d) becomes electromagnetic
Correct Answer:
becomes paramagnetic
Explanation:
No explanation available. […]
A particle with charge q is moving along a circle of radius R with unoform speed v. The associated magnetic moment μ is given by
Options
(a) 1/2 v²R (b) 1/4 qvR (c) […]
If the velocity of charged particle has both perpendicular and parallel components while moving through a magnetic field, then what is the path followed by a charged particle?
Options
(a) Circular (b) Elliptical […]
A small rod of bismuth is suspended freely between the poles of a strong electromagnet. It is found to arrange itself at right angles to the magnetic field. This observation established that bismuth is
A short magnet of magnetic moment M, is placed on a straight line. The ratio of magnetic induction fields B₁, B₂, B₃ values on this line at points which are at distance 30 cm, 60 […]
A proton of mass m and charge q is moving in a plane with kinetic energy E. If there exists a uniform magnetic field B, perpendicular to the plane motion, the proton will move in […]
A magnetic needle suspended parallel to a magnetic field requires √3 J of work to turn it through 60⁰. The torque needed to maintain the needle in this position will be:
Options
(a) […]
Two lines of force due to a bar magnet
Options
(a) Intersect at the neutral point (b) Intersect near the poles of the magnet (c) Intersect on equatorial axis of the magnet (d) […]
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