Who has first used the properties of showing the direction of the magnet and why ?
Who has first used the properties of showing the direction of the magnet and why ?
A thin long piece of a magnet when suspended freely, pointed in the north-south direction.
When it was placed on a piece of cork which was then allowed to float in still water. It is shows also north-south direction.
The name lodestone (or loadstone) given to a naturally occurring ore of iron magnetite means leading stone.
The first use of magnet was made by the Chinese people to determine the direction while traveling in the sea.
Caravans crossing the Gobi desert also employed magnetic needles.
A Chinese legend narrates the tale of the victory of the emperor Huang-ti about four thousand years ago, which he owed to his craftsmen (engineers).
These engineers built a chariot on which they placed a magnetic figure with arms outstretched. The figure swiveled around so that the finger of the statuette on it always pointed south. With this chariot, Huang-ti's troops were able to attack the enemy from the rear in thick fog and to defeat them.
Similar Questions
The unit of magnetic moment is
The unit of magnetic moment is
The distance of two points on the axis of a magnet from its centre is $10 \,cm$ and $20 \,cm$ respectively. The ratio of magnetic intensity at these points is $12.5 : 1. $ The length of the magnet will be......$cm$
The distance of two points on the axis of a magnet from its centre is $10 \,cm$ and $20 \,cm$ respectively. The ratio of magnetic intensity at these points is $12.5 : 1. $ The length of the magnet will be......$cm$
Two bar magnets having same geometry with magnetic moments $M$ and $2 M$, are firstly placed in such a way that their similar poles are same side then its time period of oscillation is $T_{1}$. Now the polarity of one of the magnet is reversed then time period of oscillation is $T_{2},$ then
Two bar magnets having same geometry with magnetic moments $M$ and $2 M$, are firstly placed in such a way that their similar poles are same side then its time period of oscillation is $T_{1}$. Now the polarity of one of the magnet is reversed then time period of oscillation is $T_{2},$ then
- [AIPMT 2002]
Due to a small magnet, intensity at a distance $x$ in the end on position is $9$ $gauss$ . What will be the intensity at a distance $\frac{x}{2}$ on broad side on position....$gauss$
Due to a small magnet, intensity at a distance $x$ in the end on position is $9$ $gauss$ . What will be the intensity at a distance $\frac{x}{2}$ on broad side on position....$gauss$
A bar magnet is placed north-south with its north pole due north. The points of zero magnetic field will be in which direction from the centre of the magnet
A bar magnet is placed north-south with its north pole due north. The points of zero magnetic field will be in which direction from the centre of the magnet