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Motion of a Charge in a Magnetic Field for GUJCET: 12 solved questions

Real GUJCET paper questions on motion of a charge in a magnetic field, part of moving charges and magnetism. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2007 to 2026. No sign-in needed to read them.

What this topic asks

• Circular motion: radius, period and energy — 11 questions
• Helical paths and field regions — 1 question

All 12 questions with solutions

• If velocity of an electron is (2̂i+3̂j) m s⁻¹ and it enters in the magnetic field of 4̂k T, then GUJCET 2007
• An electron having 18.2 keV kinetic energy is moving on a circular path in a magnetic field of 10⁻⁴ T. The sp… GUJCET 2007
• An electron and a proton of equal linear momentum enter in a direction perpendicular to a uniform magnetic fi… GUJCET 2009
• The ratio of periods of α-particle and proton moving on circular path in uniform magnetic field is . GUJCET 2014
• An alpha particle of mass m moves on a circular path of radius r in a plane normal to a uniform magnetic fiel… GUJCET 2016
• A particle of mass m and charge q is incident on XZ plane with velocity v in a direction making angle θ with… GUJCET 2017
• An electron having mass 9.1×10⁻³¹ kg, charge 1.6×10⁻¹⁹ C and moving with the velocity of 10⁶ m s⁻¹ enters a r… GUJCET 2018
• An electron is moving at a speed of 3.2×10⁷ m s⁻¹ in a magnetic field of 12×10⁻⁴ T perpendicular to the direc… GUJCET 2023
• A charged particle having charge q is moving perpendicularly to the uniform magnetic field with linear speed… GUJCET 2026
• A particle of mass m has an electric charge q. This particle is accelerated through a potential difference V… RS Academy GUJCET booklet
• A proton, a deuteron ion and an α-particle of equal kinetic energy perform circular motion normal to a unifor… RS Academy GUJCET booklet
• If the speed of a charged particle moving through a magnetic field is increased, then the radius of curvature… RS Academy GUJCET booklet