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Bar Magnet and Dipole in a Field for GUJCET: 23 solved questions

Real GUJCET paper questions on bar magnet and dipole in a field, part of magnetism and matter. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2007 to 2025. No sign-in needed to read them.

What this topic asks

• Field of a bar magnet and earth's field — 8 questions
• Magnetic moment of magnets and loops — 8 questions
• Dipole in a uniform field — 7 questions

All 23 questions with solutions

• A bar magnet of magnetic moment ⃗M is placed in a magnetic field of induction ⃗B. The torque exerted on it is GUJCET 2007
• At a given place on the Earth, the angle between the magnetic meridian and the geographic meridian is called GUJCET 2008
• In which direction is the magnetic field on the axis of a bar magnet, at a distance z from the centre of the… GUJCET 2009
• A magnetic wire of dipole moment 4π A m² is bent in the form of semi-circle. The new magnetic moment is . GUJCET 2011
• A bar magnet is placed in the position of stable equilibrium in a uniform magnetic field of induction B. If i… GUJCET 2011
• A bar magnet is oscillating in Earth's magnetic field with periodic time T. If a similar magnet with same mas… GUJCET 2013
• The Earth's magnetic field at some place on the magnetic equator of the Earth is 0.5×10⁻⁴ T. Taking the radiu… GUJCET 2014
• The effective length of a magnet is 31.4 cm and its pole strength is 0.8 A m. The magnetic moment, if it is b… GUJCET 2015
• A straight steel wire of length 2 units has magnetic dipole moment of m and the wire is bent in the form of a… GUJCET 2016
• The gyromagnetic ratio of an electron = × (specific charge of an electron). GUJCET 2019
• What is the magnitude of the equatorial fields due to a bar magnet of length 5.0 cm at a distance 75 cm from… GUJCET 2021
• A short bar magnet placed with its axis at 30° with a uniform external magnetic field of 0.25 T experiences a… GUJCET 2022
• A bar magnet having pole strength qₘ and magnetic moment m is divided into two equal parts along its length.… GUJCET 2023
• A short bar magnet placed with its axis at 30° with a uniform external magnetic field of 0.5 T experiences a… GUJCET 2024
• The horizontal component of the Earth's magnetic field at a certain plate is 3×10⁻⁵ T and the direction of th… GUJCET 2025
• A magnet of magnetic dipole moment 5.0 A m² is lying in a uniform magnetic field of 7×10⁻⁴ T such that its di… RS Academy GUJCET booklet
• A circular loop carrying current I is replaced by a bar magnet of equivalent magnetic dipole moment. The poin… RS Academy GUJCET booklet
• When a current carrying loop is replaced by an equivalent magnetic dipole, RS Academy GUJCET booklet
• Let r be the distance of a point on the axis of a bar magnet from its centre. The magnetic field at r is alwa… RS Academy GUJCET booklet
• At geomagnetic pole, a magnetic needle allowed to rotate in horizontal plane will RS Academy GUJCET booklet
• A place where the horizontal component of the Earth's magnetic field is zero lies at RS Academy GUJCET booklet
• A bar magnet of magnetic moment ⃗m is placed in uniform magnetic field ⃗B such that ⃗m∥⃗B. In this position,… RS Academy GUJCET booklet
• Two similar magnets, each of magnetic moment ⃗m, are arranged as shown in the figure. The magnetic dipole mom… RS Academy GUJCET booklet