Advertisements
Advertisements
Question
What is declination ? Draw a diagram to show the angle between the declination and true direction of geographic north.
Solution
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.
APPEARS IN
RELATED QUESTIONS
“Poles exist in pair”. Comment on this statement ?
Answer the following.
Can you bring two similar poles of two different magnetic close together easily? Why?
If a bar magnet is hung by a thread tied at its center, its north pole becomes steady in the direction of the ______ Pole of the earth.
A magnet remains steady in a ________ direction.
What are magnetic keepers? What are they used for?
Define the term Effective length of a magnet
Define the following term:
Angle of dip
Draw the magnetic field lines around a bar magnet when a bar magnet is placed such that the N pole points North.
With the help of a diagram explain the following:
Magnetisation of an iron bar by a single touch method.
Distinguish between
Natural and artificial magnets.
