European Journal of Physics

Journal Information
ISSN / EISSN : 0143-0807 / 1361-6404
Published by: IOP Publishing (10.1088)
Total articles ≅ 5,056
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Latest articles in this journal

Laura Borgongino, Sara Rufrano Aliberti, Francesco Romeo,
Published: 18 October 2021
European Journal of Physics; https://doi.org/10.1088/1361-6404/ac3097

Abstract:
We present a kinematic model for horizontal, uphill, and downhill running by which simple expressions for power input and energy expenditure can be found. Total impulse as an estimator of the post-workout fatigue is also derived. The analysis, presented as a real-world application of kinematics, can be used as a monographic lecture for high school and first-year university physics students.
Sushil Kumar Singh,
Published: 15 October 2021
European Journal of Physics; https://doi.org/10.1088/1361-6404/ac3064

Abstract:
The partition function for a system of non-interacting N-particles can be found by summing over all the accessible states of the system. The partition function for an ideal gas differs from Bosonic or Fermionic partition function in the classical regime. Students find it difficult to follow the differences arising out of incorrect counting by the classical partition function by missing out on the indistinguishability of particles and Fermi-Bose statistics. We present a pedagogical computer-based experiment to probe and demonstrate the key differences in the partition functions (i) Q, for the system of distinguishable and indistinguishable particles (ii) B, for Bosons and (iii) F , for Fermions without formally using the single-particle partition function
, Patricio Robles
Published: 15 October 2021
European Journal of Physics; https://doi.org/10.1088/1361-6404/ac3062

Abstract:
Electrons are elementary particles that repel each other due to their same electric charge. In certain cases however, the effect of quantum coherence in an appropriate environment may act to overcome this natural tendency making the electrons effectively behave as if there was an attraction between them, and form bound pairs that move as a unit. We discuss a simple case, where this unexpected binding is mediated by a rigid crystalline environment. The paper is addressed to students and teachers with an elementary knowledge of quantum and solid state physics.
Vladimir Valerievich Ivchenko
Published: 15 October 2021
European Journal of Physics; https://doi.org/10.1088/1361-6404/ac3063

Abstract:
We present a comprehensive numerical analysis of the peculiarities of the electric field, equipotential surfaces, capacitance, and surface charge density at different thickness of a charged conducting ring. First, we review the filamentary ring case and prove that, unlike a sphere, there is a non-zero electric force inside it. We find that at relatively large values of the ring thickness the electric field has a local maximum inside the hole of the toroid. We also show the existence of a region of space, where the electric field is substantially homogeneous.
Published: 15 October 2021
European Journal of Physics; https://doi.org/10.1088/1361-6404/ac3065

Abstract:
The problem of finding the shape of initially straight elastic cantilever that minimizes volume, and satisfies certain condition at the free end is analyzed. The recently analyzed longest reach problem follows as a special case. New results are presented about shape of the cantilever, having prescribed volume and having longest reach. The Pontryagin's maximum principle with cross-sectional area as "control" is used in the optimization procedure.
, Rhitabrata Bhattacharyya, Saugata Bhattacharyya
Published: 11 October 2021
European Journal of Physics; https://doi.org/10.1088/1361-6404/ac2ece

Abstract:
We have analytically explored the Rayleigh-Sommerfeld scalar diffraction for oblique incidence. We have explicitly derived the Fraunhofer diffraction formulae for oblique incidence of plane scalar wave on various apertures, such as single-slit, circular aperture, and diffraction grating. Such derivations in the background of Rayleigh-Sommerfeld scalar diffraction theory would be important for an undergraduate course on optics.
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