Question types

Magnetism question types

64 questions across 5 question groups — pick any mix to generate a Physics paper with step-by-step answer keys.

64
Questions
5
Question groups
5
Question types
Sample Questions

Magnetism questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

A magnetic needle kept nonparallel to the magnetic field in a nonuniform magnetic field experiences
  • A
    a force but not a torque
  • B
    a torque but not a force
  • both a force and a torque
  • D
    neither force nor a torque

Answer: C.

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A place where the horizontal component of Earth’s magnetic field is zero lies at
  • A
    geographic equator
  • B
    geomagnetic equator
  • C
    one of the geographic poles
  • one of the geomagnetic poles

Answer: D.

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Inside a bar magnet, the magnetic field lines
  • A
    are not present
  • B
    are parallel to the cross sectional area of the magnet
  • C
    are in the direction from N pole to S pole
  • are in the direction from S pole to N pole

Answer: D.

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The horizontal and vertical component of magnetic field of Earth are same at some place on the surface of Earth. The magnetic dip angle at this place will be
  • A
    30°
  • 45°
  • C
  • D
    90°

Answer: B.

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You can take a bar magnet and a small compass needle. Place the bar magnet at a fixed position on a paper and place the needle at various positions. Noting the orientation of the needle, the magnetic field direction at various locations can be traced.
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A bar magnet is cut into two equal parts vertically and half part of bar magnet is kept on the other such that opposite poles align each other. Calculate the magnetic moment of the combination, if m is the magnetic moment of the original magnet.
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Earth’s magnetic field at the equator is approximately $4 \times 10^{-5} T.$ Calculate Earth’s dipole moment. $($Radius of Earth $= 6.4 \times 10^6 m, µ_0 = 4\pi \times 10^{-7} SI$ units$)$
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Two bar magnets are placed on a horizontal surface. Draw magnetic lines around them. Mark the position of any neutral points (points where there is no resultant magnetic field) on your diagram.
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A circular magnet is made with its north pole at the centre, separated from the surrounding circular south pole by an air gap. Draw the magnetic field lines in the gap. Draw a diagram to illustrate the magnetic lines of force between the south poles of two such magnets.
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Two small and similar bar magnets have magnetic dipole moment of 1.0 Am² each. They are kept in a plane in such a way that their axes are perpendicular to each other. A line drawn through the axis of one magnet passes through the centre of other magnet. If the distance between their centres is 2 m, find the magnitude of magnetic field at the midpoint of the line joining their centres.
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A magnetic pole of bar magnet with pole strength of $100\  Am$ is $20\ cm$ away from the centre of a bar magnet. Bar magnet has pole strength of $200\ Am$ and has a length $5\ cm$. If the magnetic pole is on the axis of the bar magnet, find the force on the magnetic pole.
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