question_answer

Direction: Q.16 to Q.20

The Earth's magnetic field extends millions of kilometres into outer space and looks very much like a bar magnet. The Earth's south magnetic pole is actually near the north-pole and the north magnetic pole is in Antarctica. This is why a compass magnet's north-pole actually points north (north and south poles attract). The Earth's magnetic field extends far and wide but is very weak in terms of field strength.

Magnetic Declination: It is defined as the angle between the true north and the magnetic north. On the horizontal plane, the true north is never at a constant position and keeps varying depending upon the position on the Earth's surface and time.

Magnetic Inclination: The magnetic inclination is also known as the angle of dip. It is the angle made the plane on the Earth's surface. At the magnetic equator, the angle of dip is \[0{}^\circ \] and at the magnetic poles, the angle of dip is \[90{}^\circ .\]

Horizontal Component of the Earth’s Magnetic Field:

There are two components to explain the intensity of the Earth's magnetic field: Horizontal component \[({{B}_{H}})\] and vertical component \[({{B}_{V}})\].

\[\tan \delta ={{B}_{V}}/{{B}_{H}}\]

Read the above passage carefully and give the answer of the following questions:

  The vertical component of the Earth's magnetic field is at a place is \[\sqrt{3}\] times the horizontal component. What is the value of angle of dip at this place?

A) \[60{}^\circ \]                          

B) \[45{}^\circ \]      

C) \[90{}^\circ \]                          

D) \[30{}^\circ \]