Dip circle is an instrument for measuring the inclination, or dip, of the Earth's magnetic field. They consist of a magnetic needle pivoted at the centre of the vertical circular scale that can rotate in the plane of the scale about the horizon. When the dip circle is placed with the plane of the circle in the magnetic meridian of the earth, the needle points in the direction of the earth’s magnetic field. They were used in surveying, mining and prospecting as well as for the demonstration and study of magnetism.

The dip is the angle that the total magnetic field of the earth makes with the surface of earth. Hence, if the magnetic needle is balanced about a horizontal axis so that it can swing in a plane of the magnetic meridian, the needle makes an angle with the horizontal. This angle is called angle of dip or angle of inclination.

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What is dip circle?

Important Questions on Magnetism and Matter

MEDIUM

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

Name the element of Earth's magnetic field. Establish the relation between them.

MEDIUM

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

Define angle of dip.

EASY

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

What direction compass needle points at poles? Which needle to be used at poles?

EASY

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

Define magnetic inclination or angle of dip.

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

What do you mean by angle of dip?

EASY

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

Define angle of dip. Write value of angle of dip at magnetic poles of earth.

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

What is meant by angle of dip ?

MEDIUM

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

At an angle of

30 °

to the magnetic meridian, the apparent dip is

45 ° .

Find the true dip:

EASY

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

In the magnetic meridian of a certain place, the horizontal component of the dip angle is

45 ° .

What is the magnetic field of the earth at this location?
(Use Horizontal component of the magnetic field to be

0.26 G

)

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

Choose the wrong statement.

MEDIUM

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

Define the angle of 'dip' and 'declination' at a place.

EASY

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

The vertical component of earth's magnetic field at a place is

\sqrt{3}

times the horizontal component the value of angle of dip at this place is

MEDIUM

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

What do you mean by the angle of dip at a place? At what place on the earth's surface, the vertical and horizontal components of the earth's magnetic field be equal?

MEDIUM

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

At a certain place the angle of dip is

30 °

and the horizontal component of earth's magnetic field is

0.5 G

. The earth's total magnetic field (in

G

), at that certain place, is

EASY

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

At certain place on the surface of the earth, horizontal component of earth's magnetic field is same as vertical component of earth magnetic field, then what will be angle of dip at that place?

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 G

and the total strength

0.5 G .

The angle of dip 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,

δ = + 25 °

. At a point

B

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

δ = - 25 °

. We can interpret that:

What is dip circle?

Important Questions on Magnetism and Matter

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