# NEET and AIPMT NEET Physics Magnetism and Matter MCQ Questions Solved

A bar magnet of length l and magnetic dipole moment M is bent to form an arc which subtends an angle of $120°$ at centre. The new magnetic dipole moment will be

1.  $\frac{3\mathrm{M}}{2\mathrm{\pi }}$

2.  $\frac{3\sqrt{3}\mathrm{M}}{2\mathrm{\pi }}$

3.  $\frac{3\mathrm{M}}{\mathrm{\pi }}$

4.  $\frac{2\mathrm{M}}{\mathrm{\pi }}$

Concept Videos :-

#3 | Magnetic Dipole Moment & Field due to Bar Magnet
#4 | Superposition of Magnetic Field due to Bar Magnet
#5 | Field due to Short Bar Magnet
#6 | Torque Acting on Bar Magnet in Uniform Field
#7 | Work Done in Rotating Dipole in Field & PE
#8 | Oscillations of Bar Magnet in Uniform Field
#9 | Solenoid as Equivalent Bar Magnet

Concept Questions :-

Bar magnet

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Concept Videos :-

#10 | Earth's Magnetism
#11 | Apparent & True Dip
#12 | Neutral points
#13 | Comparison of Magnetic Field of Earth at Two Points
#14 | Variation of Earth's Magnetic Field

Concept Questions :-

Earth's magnetism

(3)

Difficulty Level:

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• 42%
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Concept Videos :-

#3 | Magnetic Dipole Moment & Field due to Bar Magnet
#4 | Superposition of Magnetic Field due to Bar Magnet
#5 | Field due to Short Bar Magnet
#6 | Torque Acting on Bar Magnet in Uniform Field
#7 | Work Done in Rotating Dipole in Field & PE
#8 | Oscillations of Bar Magnet in Uniform Field
#9 | Solenoid as Equivalent Bar Magnet

Concept Questions :-

Bar magnet

If we define magnetic moment like electric dipole moment

Magnetic moment ( Ampere X ${m}^{2}$ ) = Pole strength X Distance (m)

Unit of pole strength = Ampere X metre

Difficulty Level:

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Concept Videos :-

#2 | Magnetic Field & Magnetic Field Lines

Concept Questions :-

Magnetic field and field lines

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Concept Videos :-

#10 | Earth's Magnetism
#11 | Apparent & True Dip
#12 | Neutral points
#13 | Comparison of Magnetic Field of Earth at Two Points
#14 | Variation of Earth's Magnetic Field

Concept Questions :-

Earth's magnetism

Difficulty Level:

• 14%
• 62%
• 19%
• 7%
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Concept Videos :-

#10 | Earth's Magnetism
#11 | Apparent & True Dip
#12 | Neutral points
#13 | Comparison of Magnetic Field of Earth at Two Points
#14 | Variation of Earth's Magnetic Field

Concept Questions :-

Earth's magnetism

Difficulty Level:

• 36%
• 21%
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Concept Videos :-

#1 | Analogy b/w Electrostatics & Magnetostatics

Concept Questions :-

Analogy between electrostatics and magnetostatics

Difficulty Level:

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Concept Videos :-

#10 | Earth's Magnetism
#11 | Apparent & True Dip
#12 | Neutral points
#13 | Comparison of Magnetic Field of Earth at Two Points
#14 | Variation of Earth's Magnetic Field

Concept Questions :-

Earth's magnetism

Difficulty Level:

• 26%
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• 8%
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Concept Videos :-

#1 | Analogy b/w Electrostatics & Magnetostatics

Concept Questions :-

Analogy between electrostatics and magnetostatics

(1)

Difficulty Level:

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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 x and y from the centre of the magnet is
(a) ${2}^{-3}$

(b) ${2}^{-1}{3}}$

(c) ${2}^{3}$

(d) ${2}^{1}{3}}$

Concept Videos :-

#3 | Magnetic Dipole Moment & Field due to Bar Magnet
#4 | Superposition of Magnetic Field due to Bar Magnet
#5 | Field due to Short Bar Magnet
#6 | Torque Acting on Bar Magnet in Uniform Field
#7 | Work Done in Rotating Dipole in Field & PE
#8 | Oscillations of Bar Magnet in Uniform Field
#9 | Solenoid as Equivalent Bar Magnet

Concept Questions :-

Bar magnet

Difficulty Level:

• 8%
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• 7%
• 54%
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