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प्रश्न
Give detailed information about how the merchants of olden times used a magnet while travelling.
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उत्तर
In the past, it was known that a piece of magnetite (stones having magnetic properties), when hung freely, points in the north-south direction. Thus, these stones were used by merchants of olden times to find direction while travelling through unknown regions. These stones are also called loadstones (leading stones).
संबंधित प्रश्न
The metallic pointer of a plotting compass gets deflected only when it is placed near a bar magnet because the pointer has:
- The diagram shows a bar magnet surrounded by four plotting compasses. Copy the diagram and mark in it the direction of the compass needle for each of the cases B, C and D.
- Which is the north pole, X or Y?
Why does a freely suspended magnet always rest in a north-south direction?
Describe an experiment to show that the maximum attractive property is at the poles of a magnet?
The change in magnetic field lines in a coil is the cause of induced electric current in it. Name the underlying phenomenon.
Name and define the SI unit of current.
Explain with the help of a diagram how the intensity and direction of the magnetic field of a bar magnet can be determined.
By which instrument, the presence of a magnetic field be determined?
Convert 1 tesla into gauss.
Define magnetic shielding.
