Magnetic declination at a place is
- Athe horizontal angle which a line makes with true meridian
- Bthe horizontal angle which a line makes with the magnetic meridian
- Cthe horizontal angle between the true meridian and the magnetic meridianCorrect
- Dthe horizontal angle which a line makes with arbitrary meridian
Solution
Concept
Definition of declination
Step-by-step solution
1. Magnetic declination is the horizontal angle between the true meridian and the magnetic meridian at a place.
Explanation
It is east or west depending on whether the magnetic meridian lies to the east or west of true north.
Why the other options are wrong
(a) is the true bearing, (b) is the magnetic bearing and (d) is the arbitrary bearing.
Shortcut
Declination = TM ↔ MM.
Common mistake
Choosing magnetic bearing.
Correct answer: C) the horizontal angle between the true meridian and the magnetic meridian