Question map
Not attempted Correct Incorrect ★ Bookmarked
Loading…
Q29 (CDS-II/2018) Geography › World Physical Geography › Earth interior structure Answer Verified

The direction of magnetic field at any location on the earth’s surface is commonly specified in terms of

Result
Your answer: —  ·  Correct: C
Explanation

The direction of the Earth's magnetic field at any specific location is defined by two angular parameters: magnetic declination and magnetic inclination. Magnetic declination is the horizontal angle between the magnetic north (the direction a compass needle points) and the true geographic north [2]. Magnetic inclination, also known as magnetic dip, is the vertical angle that the magnetic field lines make with the horizontal plane of the Earth's surface [1]. While the total intensity of the field is described by various components including the horizontal intensity, the specific parameters used to specify the 'direction' of the field vector are declination and inclination [2]. Together, these two angles provide the three-dimensional orientation of the magnetic field relative to the local geographic coordinate system at any point on the Earth's surface.

Sources

  1. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 5: Earths Magnetic Field (Geomagnetic Field) > Magnetic Declination > p. 76
  2. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 5: Earths Magnetic Field (Geomagnetic Field) > Magnetic Inclination or Magnetic Dip or Dip Angle > p. 77
How others answered
Each bar shows the % of students who chose that option. Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
47%
got it right
✓ Thank you! We'll review this.

SIMILAR QUESTIONS

NDA-II · 2010 · Q54 Relevance score: 1.14

The direction of magnetic field at a point due to an infinitely long wire carrying current is

NDA-I · 2013 · Q55 Relevance score: 0.42

A positively charged particle projected towards west is deflected towards north by a magnetic field. The direction of the magnetic field is

NDA-I · 2025 · Q142 Relevance score: 0.37

A current through a horizontal power line flows in east to west direction. What will be the direction of magnetic field at a point directly below it when viewed from east end ?

NDA-I · 2017 · Q3 Relevance score: -0.07

At which place Earth’s magnetic field becomes horizontal ?

IAS · 2005 · Q91 Relevance score: -0.49

Consider the following statements: 1. The axis of the earth magnetic field is inclined at 23 to the geographic axis of the earth. 2. The earth’s magnetic pole in the northern hemisphere is located on a peninsula in northern Canada. 3. Earth’s magnetic equator passes through Thumna in South India. Which of the statements is/are correct?