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प्रश्न
What is declination ? Draw a diagram to show the angle between the declination and true direction of geographic north.
उत्तर
Magnetic declination is the angle of the horizontal plane between the magnetic North and the geographic North (or true North). This angle is shown in figure by symbol θ.
The angle of declination is different at different places on the earth surface and it also changes at a place with time. The declination is taken positive if the magnetic North is towards the east of the true North as in figure and is negative if the magnetic north if towards the west of the true North.
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संबंधित प्रश्न
What is a magnet?
Fill in the blank.
Magnetic poles always exist in ...............
State if the following statement is true or false. Correct the statement if it is false.
Whenever a magnet is not in use, it should be stored along with other magnets.
Answer the following in detail.
How can a magnet be demagnetized?
If a bar magnet is cut into equal pieces by cutting it at right angles to its axis at two places, ______ bar magnets are formed, and a total of _____ poles are formed.
If a magnet attracts a piece of metal, that piece must be made of ______.
Fill the blank spaces in the table given below:
| Nature of bar | Action of compass needle | |
| North Pole | South Pole | |
| Non-magnetic | No action | ________ |
| ________ | attracted | attracted |
| North pole of a bar magnet | ________ | _________ |
| ________ | attracted | repelled |
What do you understand by the term magnetic declination?
What is a natural magnet?
Define electromagnet.
