PHYS 122 General Engineering Physics II • 6 Cr.

Description

Second in a three-course survey of physics for science and engineering majors. Course presents fundamental principles of electromagnetism, including electrostatics, current electricity circuits, magnetism induction, generation of electricity, electromagnetic oscillations, alternating currents, and Maxwell's equations. Conceptual development and problem solving have equal emphasis. Laboratory work presents methods of experimental analysis (modeling, errors, graphical analysis, etc.) and prepares students for upper-division research. Prerequisite: PHYS 121 and MATH& 152 or permission of instructor.

Outcomes

After completing this class, students should be able to:





  • Laboratory Skills

    •     Use standard laboratory instruments
    appropriately, based on a sufficient understanding of their function;

    •     Measure physical quantities in the
    laboratory with appropriate attention to minimizing possible sources of random
    and systematic error;

    Laboratory
    Practice, Outcome/Assessment:  Student
    will reliably acquire data of sufficient quality to decisivly test the
    hypothesis of formal laboratory investigations. 
    Alternative or parallel assessment: 
    The student will demonstrate satisfactory performance on lab practicum
    questions associated with mid-term or final exams.

     

    •     Measure physical quantities in the
    laboratory with appropriate attention to minimizing possible sources of random
    and systematic error;

    •     Make reasonable estimates of the
    uncertainties associated with each measurement;

    •     Recognizes that measurement uncertainty is
    estimated as an act judgment on the part of the observer and that judgment does
    not imply arbitrariness.

    Measurement,
    Outcome/Assessment:  Student will
    reliably record quality data acquired through measurement, habitually assigning
    a reasonable uncertianty to each measured value.  Data analysis and conclusive statements from
    formal lab reports will demonstrate a satisfactory level

     

    •     Evaluate a hypothesis in terms of its
    testability and determine the kind and amount of data required to test it;

    •     Summarize the properties of a set of data
    to facilitate analysis, using standard statistics such as mean and standard
    deviation;

    •     Determine the uncertainty of a computed
    quantity that arises from the uncertainties in the measured values of the
    quantities from which it is computed;

    •     Analyze an appropriate set of measurements
    for consistency with a hypothesis, form and justify a conclusion regarding the
    fit between the data and the hypothesis;

     

    Communication Skills

    •     Produce a compact and unambiguous verbal
    description of an experimental procedure and of the observations/data obtained
    using it;

    •     Produce a compact and unambiguous verbal
    description of a chain of theoretical or experimental reasoning, including
    clarity regarding assumptions, accuracy regarding logical connections,
    specificity regarding conclusions, and clarity regarding the scope (and
    limitations) of applicability.

     

    Physical Problem Solving Skills

    •     Habitually sketches the configuration of
    problem elements as part of the problem solving process;

    •     Habitually uses a variety of
    representations in the problem solving process;

    •     Consciously selects an appropriate
    coordinate system;

    •     Identifies sub-problems and breaks a large
    problem into parts (linking variables).

    •     Habitually develops and interprets
    algebraic representations before substituting particular numerical values;

    •     Makes appropriate use of significant
    figures and units in problem solving;

    •     Interprets algebraic and numerical results
    in words;

     

    Fundamental Force
    Concepts

    Fundamental Force objectives

    •     Students understand that there are four
    fundamental forces in nature.

    •     The gravitational force.

    •     The electromagnetic force.

    •     The weak nuclear force.

    •     The strong nuclear force.

    •     Students will be able to interpret and use
    the vector expressions for the gravitational and electric forces.,  and to recognize the implications of these
    expressions for the analysis of many body problems by direct force calculation.

     

    Electrostatics

     

    Context for the objectives

    •     Classical Physics is applied to nature by
    making an intellectually fruitful choice of system to study.  The rest of the universe then becomes the
    environment for this system.  This
    analytic dichotomy is both a goal for instruction and a context for describing
    the objectives below.

    •     When the system and its environment each
    comprise small numbers of charges, analysis proceeds by computing the electric
    field or electric potential produced by the environmental charges, then
    computing the interaction of system charges with that field.  The force (or potential energy) of that interaction
    then becomes an input to the mechanics problem as described in Physics 121
    (114).

     

    Electrostatics General objectives

    •     The Student is able to make fruitful
    choices of system charge(s) to study and clearly distinguishes between the
    system and the environment.  The student
    can distinguish between and properly associate the field (or potential)
    belonging to the system charge from those made by charges in the environment.

    •     The student can generate expressions for
    the field (or potential) produced by the environment charges throughout the
    region containing the system charge(s) and determine the values for these
    quantities at the site of the system charge(s).

    •     The student can generate expressions for
    the interaction (force or potential energy) produced by the environment charges
    on the system charge(s) and determine the values for these interactions as
    inputs to the associated mechanics problem.

    •     The student is able to apply the learning
    objectives of the mechanics course to solve mechanics problems in this new
    context.  The student has developed the
    awareness that the mechanics principles can be generalized beyond that course.

    •     The process described above is linear,
    proceeding from cause to effect.  Once it
    is understood the student must also be able to reason (and solve problems) that
    begin with the effects as the inputs and have the causes as the desired goal.

     

    The Electrostatics Particular Objectives

    •     Students able to explain simple
    electrostatics experiments and charge separation phenomena using ideas of
    conduction, polarization of matter, and neutral pairs.

    •     The student has an introductory
    understanding of the structure and constituents of atoms, molecules, crystals
    and amorphous solids, and can describe how these structures and the very large
    number of particles involved affect the electrical properties of the respective
    macroscopic material.

    •     Students can identify the spectrum of
    electric properties of bulk matter resulting from the range of conductivity
    (zero to sensibly infinite) and understand the basic implications of these
    properties on the fields and potentials in and around matter.  The student can describe these implications
    both microscopically and macroscopically.

    •     Students recognize that the structure of
    the  field (or potential) is determined
    by the structure of the charges. 
    Students will demonstrate this understanding by identifying symmetries
    in the field (or potential) structure that arise from symmetries in the charge
    distribution (point vs. line vs. plane sources, E vs. B field structures).

    •     The student can apply symmetry arguments
    concerning field structure to the application of Gauss' law.

    •     Students recognize asymmetry in the charge
    distributions and can  relate these
    asymmetries to the structure of the fields (ex; discontinuity of E at a
    boundary, the magnetic field around a wire etc. ).

    •     The student demonstrates understanding of
    the electric field in the space around environment charges by drawing
    qualitatively correct field line maps for small numbers of charges or charged
    conductors.

    •     The student is able to apply quantitative
    aspects of basic electric field configurations in qualitative reasoning, e.g.

    •     E points away from positive charges (toward
    negative).

    •     E falls off as r squared for the point
    charge, and as r cubed for the Dipole.

    •     The force produced by one charge on another
     is equal to the force produced by the second
    charge on the first .

    •     Students recognize the analytic simplicity
    implied by the concept of superposition and can apply this understanding by
    constructing solutions to complex problems by adding the fields (or potentials)
    for simpler problems together to obtain the field (or potential) for the
    complex problem.

    •     The student can implement the previous
    objective for both discrete and continuous charge distributions.

    •     The student can compute the flux of the
    electric field and use it in Gauss' law.

    The Electric Potential Particular Objectives

    •     The student demonstrates understanding of
    the electric potential in the space around environment charges by drawing
    qualitatively correct equipotential maps for small numbers of charges or
    charged conductors.

    •     The student demonstrates understanding of
    the relationships between electric field and electric potential by the ability
    to transform electric field maps into electric potential maps and the reverse.

    The Electric Circuit Particular Objectives

    •     The student clearly distinguishes electric
    potential from current in electric circuits and recognizes current as a
    material flow (conserved) that proceeds in the direction of the gradient of the
    potential.

    •     The student can link electric potential in
    electric circuits to the concept of potential described above and to models of
    circuit potential such as water pressure or "electrical height".

    •     Students can analyze simple series and
    parallel networks using equivalent circuits, solving for any desired variable.

    •     Students can analyze complex networks using
    Kirchoff's rules.

    •     The student understands and can apply the
    formal definitions for capacitance, resistance, current, current density,  resistivity, power, EMF and internal
    resistance.

    •     Students can predict the outcome of simple
    shorting and disconnecting experiments.

    •     Students can analyze RC and LR circuits
    using calculus, solve problems using this analysis, and predict qualitatively
    the time behavior of such circuits.

    The Magnetic Field Particular Objectives

    •     The student can predict field geometries
    from source geometries and can apply the laws of Bio-Savart and Ampere to this
    problem.

    •     The student can determine the forces
    exerted on system charges or currents by external magnetic fields (Lorentz
    Force).  In addition to other common
    geometries, the student will be able to compute the torque on dipoles and
    current loops.

    •     The student can apply the appropriate Right
    Hand Rule to both objectives above.

    •     In the absence of point sources for the
    magnetic field, students recognize the dipole as a model for many magnetic
    field structures.

    •     The student can apply symmetry arguments
    based on the sources to the structure of the magnetic field and use this
    together with Amperes law to solve problems or draw conclusions about
    phenomena.

    The Field-Field Particular Objectives

    •     The student understands that changing
    Magnetic fields produce Electric fields, and that changing Electric fields
    produce Magnetic fields.  The student can
    properly apply the Right Hand Rule for these interactions and lens law for
    general induction phenomena.

    •     The student can describe the physical
    principles that explain motors and generators and the conceptual similarities
    between these devices.

     

     

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