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Q1: Imaginary line passing through points having equal magnetic declination is termed as

A isogon

B agonic line

C isoclinic line

D none of these.

ANS:A - isogon

Isogonic lines are lines on the Earth's surface along which the declination has the same constant value, and lines along which the declination is zero are called agonic lines. δ is frequently used as the symbol for magnetic declination. ISOGONIC-----> same declination.
AGONIC--------> zero declination.
ISOCLINIC------> same dip.
ACLINIC---------> zero dip. Isogonic lines passes through points of the same declination.
The agonic line passes through points of zero declination.



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