Advertisements
Advertisements
Question
Give detailed information about how the merchants of olden times used a magnet while travelling.
Advertisements
Solution
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).
RELATED QUESTIONS
A magnet attracts:
- 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?
Define current. Give its S.I. unit.
Fill in the blank.
Like poles ..................... each other.
The unit of magnetic flux density is ______.
By which instrument, the presence of a magnetic field be determined?
A current flowing in a wire gives rise to a magnetic field.
The magnetic field lines due to a straight wire carrying current are parallel.
The magnetic field is a quantity that has magnitude only.
Define magnetic shielding.
