engineering recuitment UKPSC Polytechnic Lecturer Mock Test 2024 Surveying Compass Surveying and Theodolite
What is the secular variation of magnetic declination?
1
Magnetic meridian swings like a pendulum
2
Change in the declination at a place over a period of one year
3
Change in the declination at a place in 24 hours
4
Variation caused due to a magnetic disturbance or storm