Terrestrial 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 $=30°$..

Earth's magnetic field has a horizontal component except at

The earth's magnetic field

The angle of dip at magnetic equator of earth is $0^{\circ }$

Where is the magnetic equator?

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.

The south pole of earth's magnet is in the

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 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 :-

Assertion : The colourful curtain of green and pink lights in the sky, (which is called "Aurora Borealis") are seen in the polar regions like Alaska and North Canada, but it is not seen in India.

Reason : The earth's magnetic field lines come closer to each other at the magnetic poles, so the charge's density of the charges ejected from the sun, increases near the magnetic poles.

The earth's magnetic field was flipped by $180°$ a million years ago. This flip was relatively rapid and took ${10}^5$ years. Then the average change in orientation per year during the flip closest to

The true value of angle of dip at a glace is $60°$, the apparent dip in a plane inclined at an angle of $30°$ with magnetic meridian is

A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It

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