The direction of magnetic field at any location on the earth’s surface is commonly specified in terms of
field declination
field inclination
both field declination and field inclination
horizontal component of the field
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC CDS-2 – 2018
Magnetic Declination is the angle in the horizontal plane between magnetic north (the direction a compass needle points) and true geographic north.
Magnetic Inclination (or Dip angle) is the angle between the magnetic field vector and the horizontal plane. This angle measures how steeply the field lines dip into the Earth.
Together, declination specifies the horizontal direction (azimuth), and inclination specifies the vertical angle (dip), thus defining the orientation of the magnetic field vector.