The 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?

Earth's magnetic field always has a horizontal component except at

The earth's magnetic field

Assertion: The geographic north-pole does not coincide with the magnetic north pole.

Reason: The axis of the hypothetical dipole inside the earth is tilted by approximately $11.3^{\circ }$ with respect to the axis of rotation of the earth.

A line passing through the places having zero value of magnetic dip is called _____ (aclinic/isoclinic) line.

A dip needle in a plane perpendicular to the magnetic meridian will remain (vertical/horizontal).

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

A Jet plane is travelling west at $450$ metres per second. If the horizontal component of Earth's magnetic field is $4\times {10}^{-4}$ Tesla and angle of dip is $30°,$ Then the vertical component is

The net magnetic field at neutral points is _____.

The angle between magnetic meridian and geographical meridian is called angle of _____.

The value of the angle of dip at magnetic equator of earth is zero.

The angle between magnetic meridian and geographical meridian is called angle of _____.

The net magnetic field at neutral points is _____.

The angle of dip at a place is $30°$ and the intensity of the vertical component of the earth's magnetic field $V=6\times {10}^{-5}$ tesla. The total intensity of the earth's magnetic field $\left(I\right)$ at this place is :

The Earth's magnetic field always has a horizontal component except at :-