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The North pole of earth's magnet is in the geographical north.

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Important Questions on Magnetism and Matter

EASY

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

Where on the surface of the earth is the vertical component of earth's magnetic field zero?

MEDIUM

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

A jet plane with a wing-span of

25 m

is travelling horizontally towards the east with a speed of

3600 km / hour

. If the Earth's magnetic field at the location is

4 \times 10^{- 4} 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

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

EASY

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

What is meant by angle of dip ?

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,

δ = + 25 °

. At a point

B

on the earth’s surface, the angle of dip,

δ = - 25 °

. We can interpret that:

EASY

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

When a magnetic needle free to rotate in horizontal plane is taken to a magnetic pole of the Earth, it is unable to show the magnetic directions and orient itself in any direction. Why?

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

EASY

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

Define the elements of the earth's magnetic field.

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

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

A magnetic needle free to rotate in vertical plane is taken to a magnetic pole of the Earth. How will it orient itself ?

MEDIUM

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

Define magnetic declination. How does it depend on latitudes?

EASY

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

Define magnetic declination and dip at a place.

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^{- 5} t e s l a

where the dip angle is

60 °

. The magnitude of the earth's magnetic field is,

EASY

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

Define angle of declination at a place.

MEDIUM

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

The magnetic field and angle of dip at a place on the earth are

0.3 G

and

30 °

, respectively. The value of vertical component of the earth’s magnetic field at the place is _____.

EASY

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

Magnetic meridian is a plane___.

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

θ_{1}

and

θ_{2}

be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of dip

θ

is given by

EASY

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

The North pole of Earth's magnet is near the geographical

The North pole of earth's magnet is in the geographical north.

Important Questions on Magnetism and Matter

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