What is geographical north pole?

Important Questions on Magnetism and Matter

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

The strength of the Earth’s magnetic field is

MEDIUM

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

The horizontal component of the earth's magnetic field is $3.6\times {10}^{-\mathrm{5 }} \mathrm{t}\mathrm{e}\mathrm{s}\mathrm{l}\mathrm{a}$ where the dip angle is $60°$. The magnitude of the earth's magnetic field is,

MEDIUM

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

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

MEDIUM

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

A jet plane with a wing-span of $25 \mathrm{m}$ is travelling horizontally towards the east with a speed of $3600 \mathrm{km}/\mathrm{hour}$. If the Earth's magnetic field at the location is $4\times {10}^{-4} \mathrm{T}$ and the angle of dip is $30°$, then, the potential difference between the ends of the wing is

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

At a certain place, the horizontal component of earth's magnetic field is $\frac{1}{\sqrt{3}}$ times the vertical component. The angle of dip at that place is

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

At a point $A$ on the earth’s surface the angle of dip, $\delta =+25°$. At a point $B$ on the earth’s surface, the angle of dip, $\delta =-25°$. We can interpret that:

MEDIUM

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

A magnetic compass needle oscillates $30$ times per minute at a place where the dip is $45°$ and $40$ times per minute where the dip is $30°$. If $B_1$ and $B_2$ are the net magnetic fields due to the earth at the two places respectively, then the ratio $\frac{B_1}{B_2}$ is approximately equal to

MEDIUM

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

If ${\theta }_1$ and ${\theta }_2$ be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip $\theta$ is given by

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

A magnet makes $40$ oscillations per minute at a place having magnetic field intensity of $0.1\times {10}^{–5} \mathrm{T}$. At another place, it takes $2.5\sec$ to complete one vibration. The value of earth's horizontal field at that place is

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

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

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

At a certain place, the angle of dip is $60°$ and the horizontal component of the earth's magnetic field $\left(B_H\right)$ is $0.8\times {10}^{-4} \mathrm{T}$. The earth's overall magnetic field is

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

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

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

At the magnetic north pole of the earth, the value of the horizontal component of earth's magnetic field and angle of dip are respectively -

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

The earth's magnetic field at a certain place has a horizontal component 0.3 Gauss and the total strength 0.5 Gauss. The angle of dip is

HARD

Physics>Electricity and Magnetism>Magnetism and Matter>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 $=30°$..

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

The magnitude of the earth's magnetic field at a place is $B_0$ and the angle of dip is $\delta$. A horizontal conductor of length $l$, lying north-south, moves eastwards with a velocity $v$. The emf induced across the rod is

MEDIUM

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

Calculate the angle of dip, if a dip needle oscillating in a vertical plane make $40$ oscillations per minute in a magnetic meridian and $30$ oscillations per minute in a vertical plane at right angle to the magnetic meridian

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

At the magnetic poles of the earth, a compass needle will be

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

At the magnetic poles of the earth, a compass needle will be

EASY

Physics>Electricity and Magnetism>Magnetism and Matter>The Earth's Magnetism

The angle of dip at a certain place on earth is $60°$ and the magnitude of the earth's horizontal component of the magnetic field is $0.26 \mathrm{G}$. The magnetic field at the place on earth is