Earth's Magnetism

Two coils, each of $100$ turns, are held such that one line in the vertical plane with their centres coinciding. The radius of the vertical coil is $20 \mathrm{cm}$ and that of the horizontal coil is $30 \mathrm{cm}$. How would you neutralize the magnetic field of the earth at their common centre? What is the current to be passed through each coil? Horizontal of earth's magnetic induction$=3.49 \times {10}^{-5} T$ and angle of dip $=30°$..

We say that at places like Delhi and Mumbai, a magnetic needle shows the true north direction quite accurately as compared to other places in India.

The given statement is True or False?

Isodynamic lines pass through Places that have the same value of the _____ of the earth’s magnetic field.

What are isogonic, isoclinic and isodynamic lines?

Define the term Isodynamic lines in case of magnetic maps.

The lines joining places of equal values of horizontal component of Earth’s magnetic field are called

Define Isodynamic lines.

What is magnetic axis, magnetic meridian & magnetic equator.

Magnetic meridian is a plane _________.

How many quantities are required to specify the magnetic field of the earth.

The angle between the magnetic axis and geographical axis of the earth is _____

The vertical plane which passes through the magnetic axis of a freely suspended magnet at rest is called -

What are isogonic lines?

Explain about aclinic lines.

Where is the magnetic equator?

What is the value of the angle of dip at magnetic poles of earth?

At a given place on the Earth's surface, the horizontal component of earth's magnetic field is $3\times {10}^{-5} \mathrm{T}$ and resultant magnetic field is $6\times {10}^{-5 }\mathrm{T}$. The angles of dip at this place is

At a given place on the Earth, the angle between the Magnetic meridian and the Geographic meridian is called

The strength of the Earth’s magnetic field is

At certain place, horizontal component is $\frac{1}{\sqrt{3}}$ times the vertical component. The angle of dip is