PhysicsHardHigh School (11–12)Electricity & Magnetism › Magnetic Effects of CurrentNEETAEEE (Amrita)AMUEEEAP EAPCETBCECECMI Entrance
Created by StemPy LabAssertion (A): A narrow beam of charged particles enters a region of space and leaves it without any change in its direction. A student concludes that no magnetic field can be present in that region. Reason (R): A magnetic field exerts no force on a charged particle that moves parallel or antiparallel to the field.
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← The figure shows three loops, U, V and W, made from equal lengths of the same wire: a circle, a square and an equilateral triangle. Each carries the same current. Each is placed in turn in the same uniform magnetic field, with its plane parallel to the field. Compare the torques τU, τV and τW on the loops. Which option is correct?Two statements about the field lines of a bar magnet are given below.
Statement I: The net magnetic flux through a closed surface around the whole of a bar magnet is zero.
Statement II: Outside a bar magnet the field lines run from its south pole to its north pole, and inside it they run from north to south. →
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