The word magnet is derived from the name of an island in Greece called

A thin long piece of a magnet, when suspended freely, pointed in the direction

The earth behaves as a magnet with the magnetic field pointing approximately from the geographic .

The tip which points to the geographic north is called the north

If a bar magnet is broken into two halves, we get

. Unlike electric charges, isolated magnetic north and south poles known as

The magnetic field lines of a magnet (or a solenoid) form continuous

the magnetic field lines are called

the number of field lines crossing per unit area

The magnetic field lines do not

the direction of the magnetic field would not be ...... at the point of intersection

a bar magnet and a solenoid produce ..... magnetic fields

The magnetic moment of a bar magnet is thus equal to the magnetic moment of an equivalent solenoid that produces the ..... magnetic field.

the magnetic needle has magnetic moment 6.7 × 10–2 Am2 and moment of inertia I = 7.5 × 10–6 kg m2. It performs 10 complete oscillations in 6.70 s. What is the magnitude of the magnetic field?

A short bar magnet placed with its axis at 30° with an external field of 800 G experiences a torque of 0.016 Nm. (a) What is the magnetic moment of the magnet? (b) What is the work done in moving it from its most stable to most unstable position? (c) The bar magnet is replaced by a solenoid of cross-sectional area 2 × 10–4 m2 and 1000 turns, but of the same magnetic moment. Determine the current flowing through the solenoid

What is the magnitude of the equatorial and axial fields due to a bar magnet of length 5.0 cm at a distance of 50 cm from its mid-point? The magnetic moment of the bar magnet is 0.40 A m2

closed surface represented by i , the number of lines leaving the surface is equal to the number of lines entering it. This is consistent with the fact that no net charge is enclosed by the surface

The earth’s magnetic field at the equator is approximately 0.4 G. Estimate the earth’s dipole moment

In the magnetic meridian of a certain place, the horizontal component of the earth’s magnetic field is 0.26G and the dip angle is 60°. What is the magnetic field of the earth at this location?

A solenoid has a core of a material with relative permeability 400. The windings of the solenoid are insulated from the core and carry a current of 2A. If the number of turns is 1000 per metre, calculate M

substances are those which have tendency to move from stronger to the weaker part of the external magnetic field. In other words, unlike the way a magnet attracts metals like iron

sabstances are those which get weakly magnetised when placed in an external magnetic field

substances are those which gets strongly magnetised when placed in an external magnetic field

Substances which at room temperature retain their ferromagnetic property for a long period of time are called

The hysteresis curve of such materials must be narrow. The energy dissipated and the heating will consequently be