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Permanent Magnets — JEE Main & Advanced Physics PYQs

45 previous year questions from Permanent Magnets with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

45 questionsPhysicsSolutions on every page
1

The magnetic field at a point situated 10 cm from a magnetic dipole is observed to be 2.0 10⁻⁴ T . Calculate the magnetic moment of the dipole if this point is located in the broad

Concepts Of Physics MCQ Edition [Volume 2] Solution View → 2

The magnetic field at a point due to a magnetic dipole is perpendicular to the magnetic axis. Find the angle that the line joining the point with the centre of the dipole makes wit

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Two long bar magnets are positioned such that their axes coincide and the north pole of the first magnet is located 2.0 cm away from the south pole of the second. Given that both m

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A long bar magnet possesses a pole strength of 10 Am . Determine the magnetic field at a point situated on the magnet's axis, at a distance of 5 cm from its north pole.

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A magnetic dipole having a magnetic moment of 1.44 A m ^2 is positioned horizontally such that its north pole points towards the north. Determine the location of the neutral point,

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A magnetic dipole having a magnetic moment of 0.72 2 A m ^2 is oriented horizontally such that its north pole points towards the east. Determine the position of a neutral point, gi

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Assume the magnetic moment of the dipole at the earth's centre is 8.0 10²² A m ^2 . Determine the magnetic field B at the earth's geomagnetic poles. The radius of the earth is 6400

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Suppose the magnitude of the earth's magnetic field at the magnetic equator is 3.4 10⁻⁵ T . Find its value at the geomagnetic poles of the earth.

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A magnetic needle can freely rotate in a vertical plane that makes an angle of 60^ with the magnetic meridian. If the needle settles in a direction making an angle of ⁻¹ ( 2 3 ) wi

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When a current of 10 mA is passed through a tangent galvanometer, it exhibits a deflection of 45^ . Determine the number of turns in the coil, given that the horizontal component o

Concepts Of Physics MCQ Edition [Volume 2] Solution View → 11

In a certain position, the needle of a dip circle indicates an apparent dip of 45^ . When the circle is rotated by 90^ , the apparent dip shown is 53^ . Determine the true dip.

Concepts Of Physics MCQ Edition [Volume 2] Solution View → 12

A moving-coil galvanometer contains a 50 -turn coil with dimensions 2 cm 2 cm . It is suspended between magnetic poles that produce a magnetic field of 0.5 T . Determine the torque

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When placed at a separation of 10 cm from the needle, a short magnet causes a deflection of 37^ in a deflection magnetometer in the Tan-A position. Determine the ratio of the magne

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The magnetic field at a point situated 10 cm from a magnetic dipole is observed to be 2.0 10⁻⁴ T . Calculate the magnetic moment of the dipole if this point is located in the end-o

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When positioned 10 cm from the needle, a short magnet causes a 37^ deflection in a deflection magnetometer set in the Tan-A position. At what separation must the magnet be placed t

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A deflection magnetometer is arranged with its arms oriented in the north–south direction. At what distance and in which orientation must a short magnet having M/B_H = 40 A m ^2 T

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A bar magnet is 8 cm long. At a distance of 3 cm from its centre in the broadside-on position, the magnetic field is measured to be 4 10⁻⁶ T . Determine the pole strength of this m

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In an oscillation magnetometer, a bar magnet requires /10 second to complete one oscillation. The moment of inertia of the magnet about its axis of rotation is 1.2 10⁻⁴ kg m ^2 , a

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In an oscillation magnetometer, a combination of two bar magnets completes 10 oscillations per second when their like poles are tied together, and 2 oscillations per second when th

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A short magnet in an oscillation magnetometer oscillates with a time period of 0.10 s at a location where the earth's horizontal magnetic field is 24 T . A downward current of 18 A

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In an oscillation magnetometer, a bar magnet completes 40 oscillations per minute. A completely demagnetized identical magnet is then placed over the first magnet in the magnetomet

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In an oscillation magnetometer, a short magnet completes 40 oscillations per minute at a location where the earth's horizontal magnetic field is 25 T . A second short magnet, posse

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In an oscillation magnetometer, a short magnet completes 40 oscillations per minute at a location where the earth's horizontal magnetic field is 25 T . A second short magnet, posse

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A magnetic dipole having a magnetic moment of 0.72 A m ^2 is placed horizontally such that its north pole points towards south. Determine the position of the neutral points, given

Concepts Of Physics MCQ Edition [Volume 2] Solution View → 25

At a location where the angle of dip is 60^ , the earth's magnetic field has a horizontal component of 26 T . Determine the vertical component as well as the magnitude of the magne

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Several equipotential surfaces of a magnetic scalar potential are depicted in the figure. Determine the magnitude of the magnetic field B at a point within this region.

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A uniform magnetic field of 0.20 10⁻³ T is present in space. Determine the change in the magnetic scalar potential as one travels through 50 cm along the field.

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When a current-carrying circular loop is replaced by an equivalent magnetic dipole, a point located on the axis of the loop corresponds to the

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If a current in a circular loop is equivalently substituted by a magnetic dipole,

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Let r denote the distance from the centre of a magnetic dipole to a point on its axis. The magnetic field at this point is proportional to

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As illustrated in the figure, two short magnets with equal dipole moments M are joined perpendicularly at their centres. What is the magnitude of the magnetic field at a distance d

Concepts Of Physics MCQ Edition [Volume 2] Solution View → 32

The magnetic meridian corresponds to

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If a compass needle, which is constrained to rotate in a horizontal plane, is transported to a geomagnetic pole, it

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A dip circle is positioned at the geomagnetic equator. Its needle is permitted to rotate in a vertical plane perpendicular to the magnetic meridian. The needle will remain

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Of the four graphs provided, which one best represents the current-deflection relation for a tangent galvanometer?

Concepts Of Physics MCQ Edition [Volume 2] Solution View → 36

A tangent galvanometer is directly connected to an ideal battery. If the coil's number of turns is doubled, the deflection will

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Suppose a current-carrying circular loop is substituted with its equivalent magnetic dipole. A point situated on the loop lies in the

Concepts Of Physics MCQ Edition [Volume 2] Solution View → 38

When the current is doubled, the deflection also doubles in

Concepts Of Physics MCQ Edition [Volume 2] Solution View → 39

A circular loop of radius a carries an electric current i . A very long bar magnet is positioned such that its north pole is located at the centre of the loop. The magnetic field p

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Suppose r represents the distance of a point on the axis of a bar magnet from its centre. The magnetic field at this location is proportional to

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Choose the correct statements.

Concepts Of Physics MCQ Edition [Volume 2] Solution View → 42

A magnetic dipole is aligned in the north-south direction. Suppose P₁ , P₂ , Q₁ , and Q₂ are four points placed at equal distances from the dipole towards the north, south, east, a

Concepts Of Physics MCQ Edition [Volume 2] Solution View → 43

A horizontal circular loop carries a current that appears clockwise when observed from above. It is substituted by an equivalent magnetic dipole consisting of a south pole S and a

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A magnetic dipole is aligned in the north-south direction. Suppose P₁ , P₂ , Q₁ , and Q₂ are four points placed at equal distances from the dipole towards the north, south, east, a

Concepts Of Physics MCQ Edition [Volume 2] Solution View → 45

For measuring the magnetic moment of a bar magnet, one could use

Concepts Of Physics MCQ Edition [Volume 2] Solution View →
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