The plane of a dip circle is set in the geographic meridian and the apparent dip is δ 1 . It is then set in a vertical plane perpendicular to the geographic meridian. The apparent dip angle is δ 2 . The declination θ at the place is

tan − 1 ⁡ tan ⁡ δ 1 tan ⁡ δ 2

tan − 1 ⁡ tan ⁡ δ 1 + tan ⁡ δ 2

tan − 1 ⁡ tan ⁡ δ 1 − tan ⁡ δ 2

Select the correct statement from the following:

Magnetic dip increases as we move away from the equator towards the magnetic pole

The magnetic dip is zero at the centre of the earth

Magnetic dip decreases as we move away from the equator towards the magnetic pole

Magnetic dip does not vary from place to place

Choose the correct option.

True dip is less than apparent dip.

True dip is not mathematically related to apparent dip.

True dip is always greater than the apparent dip.

True dip is always equal to apparent dip.

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IMPORTANT

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When a bar magnet of pole strength $' m'$ and magnetic moment $' M'$ is cut into equal parts longitudinally and transversely then pole strength and magnetic moment of each piece is respectively

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Important Questions on Matter and Magnetism

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IMPORTANT

Physics Crash Course KCET (UG)>Chapter 26 - Matter and Magnetism>Exercise 1>Q 14

A bar magnet of length $l$ and magnetic dipole moment $M$ is bent in the form of an are as shown in the figure. The new magnetic dipole moment will be

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IMPORTANT

Physics Crash Course KCET (UG)>Chapter 26 - Matter and Magnetism>Exercise 1>Q 15

A magnetized wire of magnetic moment

M

is bent into an arc of a circle that substends an angle of

60 °

at the centre. The equivalent magnetic moment is

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Physics Crash Course KCET (UG)>Chapter 26 - Matter and Magnetism>Exercise 1>Q 16

A bar magnet is cut into two equal halves by a plane parallel to the magnetic axis. Of the following physical quantities, the one which remains unchanged is

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Physics Crash Course KCET (UG)>Chapter 26 - Matter and Magnetism>Exercise 1>Q 17

Two identical thin bar magnets each of length

l

and pole strength

m

are placed at right angles to each other with north-pole of one touching south-pole of the other, then the magnetic moment of the system is

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Physics Crash Course KCET (UG)>Chapter 26 - Matter and Magnetism>Exercise 1>Q 18

The magnetic field of earth at the equator is approximately

4 \times 1 0^{- 5} T

. The radius of earth is

6.4 \times 1 0^{6} m

. Then the dipole moment of the earth will be nearly of the order of :

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Physics Crash Course KCET (UG)>Chapter 26 - Matter and Magnetism>Exercise 1>Q 19

Two points $A$ and $B$ are situated perpendicular to the axis of $4 cm$ long bar magnet at distances $x$ and $3 x$ from its centre on opposite sides. The ratio of magnetic inductions at $A$ and $B$ will be equal to

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Physics Crash Course KCET (UG)>Chapter 26 - Matter and Magnetism>Exercise 1>Q 20

The magnetic field at a point X on the axis of a small bar magnet is equal to the field at a point Y on the equator of the same magnet. The ratio of the distances of point X and Y from the centre of the magnet is :-

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Physics Crash Course KCET (UG)>Chapter 26 - Matter and Magnetism>Exercise 1>Q 21

The ratio of magnetic fields due to a bar magnet at the two axial points

P_{1}

and

P_{2}

which are separated from each other by

10 cm

25 : 2

P_{1}

Point is situated at

10 cm

from the centre of the magnet. (Points

P_{1}

and

P_{2}

are on the same side of magnet and distance of

P_{1}

and

P_{2}

from the centre of magnet is much greater than the distance of two ends of the magnet from the centre). Magnetic length of the bar magnet is

When a bar magnet of pole strength 'm' and magnetic moment 'M' is cut into equal parts longitudinally and transversely then pole strength and magnetic moment of each piece is respectively

Important Questions on Matter and Magnetism

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When a bar magnet of pole strength $' m'$ and magnetic moment $' M'$ is cut into equal parts longitudinally and transversely then pole strength and magnetic moment of each piece is respectively