List of top Physics Questions on the earth's magnetic field

The magnetic intensity at the centre of a long current carrying solenoid is found to be 1.6 x 10³ Am^-1. If the number of turns is 8 per cm, then the current flowing through the solenoid is_____A.

Certain galvanometers have a fixed core made of non magnetic metallic material. The function of this metallic material is 

At a place, the horizontal component of earth's magnetic field is $4 \times 10^{-4}T$ and angle of dip is 60°. The value of horizontal component of earth's magnetic field at the equator is :

Match List-I with List-II

Choose the correct answer from the options given below:

The horizontal component of Earth’s magnetic field at a place is 3 × 10^-5 T. If the dip at that place is 45°, the resultant magnetic field at that place is

Two satellites A and B, having masses in the ratio 4 : 3, are revolving in circular orbits of radii 3r and 4r respectively around the earth. The ratio of total mechanical energy of A to B is

Which of the following statement proves that Earth has a magnetic field?

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

The relations amongst the three elements earth's magnetic field, namely horizontal component H, vertical component V and dip d are, (B$_E$ = total magnetic field)

The time period of oscillation of a magnet in a vibration magnetometer is 1.5 sec. The time period of oscillation of another magnet similar in size, shape and mass but having 1/4 magnetic moment than that of the 1st magnet oscillating at the same place will be

At a place, if the earth's horizontal and vertical components of magnetic fields are equal, then the angle of dip will be

If the vertical component of earth's magnetic field at a place is √3 times the horizontal component, then the value of dip at that place is

The angles of dip at the poles and the equator respectively are

The angles of dip at the poles and the equator respectively are

At a certain place, the angle of dip is $ 60^{\circ} $ and the horizontal component of the earth?? magnetic field $ (B_{H}) $ is $ 0.8 \times 10^{-4} \, T $ . The earth?? overall magnetic field is

The angle between the true geographic north and the north shown by a compass needle is called as

The plane of a dip circle is set in the geographic meridian and the apparent dip is $\delta_1$. It is then set in a vertical plane perpendicular to the geographic meridian. The apparent dip angle is $\delta_2$. The diclination $\theta$ at the plane is

The angle between magnetic meridian and geographical meridian is known as

If $B_{H}=\frac{1}{\sqrt{3}} B_{v}$, find angle of dip. (where symbols have their usual meanings)

A magnetic needle is placed on a cork floating in a still lake in the northern hemisphere. Does the needle together with the cork move towards the north of the lake?

If $B_{H}=\frac{1}{\sqrt{3}} B_{V}$, find angle of dip. (where symbols have their usual meanings)

In a deflection magnetometer, the external magnet should be replaced:

The magnetic field of earth at the equator is approximately $4 \times 10^{-5} \, T$. The radius of earth is $6.4 \times 10^6 \, m$. Then the dipole moment of the earth will be nearly of the order of:

A galaxy is moving away from the Earth so that a spectral line at 600 nm is observed at 601 nm . Then the speed of the galaxy with respect to the Earth is

The earth?? magnetic field always has a vertical component except at the