Announcements for Physics 272 (Prof. Agashe) – Spring 2019

 

(1). Please pick -up HW's, exams and quizzes from slot next to Rm. 3118 of PSC and check that all scores have been entered correctly in ELMS (if not, then contact the corresponding TA's ASAP).

 

(2). Solutions to final exam are posted here.

 

(3). Solutions to HW 2-12, quizzes 1-10 and problems from Wednesday session are posted here.

 

(4). Information about final exam:

 

(a). It is on Tuesday, May 21 from 1.30 to 3.30 pm. in Rm. 1201 of Toll building (usual class room, but not usual time!).

 

(b). It will have same style/format as midterms, for example, formulae that you need will be given on 

front sheet (no other notes etc. are allowed).

 

A sample cover page is here.

 

(c). It will be cumulative, i.e., (roughly) cover all chapters (21-31)/HW's (2-12) that we will do.

 

In particular, there will be 6 problems, each with multiple parts. First one will be on Ampere's law for a simple geometry; second and third on Faraday's and Lenz's law (including mutual inductance, i.e., changing current in one coil inducing emf in another); fourth

on a RC circuit (there will be not be any need to use Kirchhoff's laws); fifth on the basics of (including energy transported by)

a plane, sinusoidal electromagnetic wave and last one on Gauss’s law for a simple geometry.

 

(Note that all of these are rough descriptions only.)

 

 

(d). A review session was be held on Wednesday, May 15 (reading day) from 1 to 3 pm. in Rm. 1304 of Toll building.

 

Here is the list of problems that we were covered: # 46 (EM wave), # 38 and # 41 (Faraday's/Lenz's laws),

# 30 (RC circuit) all from Wednesday session; Example 28-6 from Giancoli (also done in lecture: Ampere's law)

and # 1 from 1st midterm (Gauss's law).

 

(e) The exam problems will be of (roughly) similar level of difficulty/ease as the ones on HW (which are mostly from the

textbook Giancoli), Wednesday discussion sessions and quizzes.

 

A set of practice problems is posted here.

 

However, you will not have to actually do an integral in this particular exam (of course, once you use symmetry of the problem, e.g., integral B . dl in Ampere's law problems etc.).

 

Also, a list of formulae/concepts is posted here in order to help you study, but (again) this cannot be brought to the exam.

 

(f). You should bring calculators: it will be ideal if they are not part of cell-phones.

 

(5). Quiz averages are 7.84, 8.57, 7.57, 6.75, 7.86, 8.96, 6.3, 9.12 and 8.02 (each out of maximum

possible of 10), with standard deviations of 2.32, 2.64, 2.7, 3.01, 2.29, 1.44, 2.69, 1.57 and 2.02.

 

(6). The schedule/location of office hours for the weeks starting May 13 and May 20 is as:

 

(a). By instructor:

 

 2.30-3.30 pm. in Rm. 3118 of PSC on each of May 14 (Tuesday); May 16 (Thursday); May 17 (Friday) and May 20 (Monday).

 

(b) By Kaustubh Deshpande (one of the TA’s):

 

10.00-11.00 am. on each of May 13 (Monday); May 15 (Wednesday) and May 20 (Monday),

all in Rm. 3260 of PSC

 

Please note location and days carefully.

 

(7). 2st midterm exam was held on April 25:

 

(a). Solutions are posted here.

 

(b). Problems 1 and 2 were graded by me, while # 3 and 4 by the TA, Kaustubh Deshpande. So, please try to

raise issues (especially detailed ones) about grading directly with the respective graders (and read carefully the

solutions – and statements of the problems themselves - before approaching us because some of your

questions might be answered simply by doing so).

 

(c). Average score (out of a maximum possible of 50) was 41.02 (i.e., about 80%), with a standard deviation of 8.84.

 

A distribution of scores is given here.

 

 

(8). Notes posted:

 

(a). A Kirchhoff’s rules problem is here.

 

(b). Magnetic force on current-carrying wire (from that on a point charge) is here.

 

(c). Magnetic field due to straight, but finite length current-carrying wire is here.

 

(9). 1st midterm (which was held on March 14):

 

(a). Solutions are posted here.

 

(b). Problems 1 and 3 were graded by me, while # 2 and 4 by the TA, Kaustubh Deshpande. So, please try to

raise issues about grading directly with the respective graders (and read carefully the solutions before approaching us

because some of your questions might be answered simply by doing so).

 

(c). Average score (out of a maximum possible of 45) was 30.82 (i.e., 68.5%), with a standard deviation of 10.41. A distribution of scores is given here.

 

(10). There is an excellent opportunity for you all to continue your physics studies during the coming Fall semester in Florence, Italy:

it is likely that our own Prof. Orozco will teach Phys273 (topic is “Waves’’, i.e., a sort of continuation of Phys272) and Phys371 (Modern Physics).

 

Please see the updated PDF here (and the one from last year here) and contact Prof. Orozco (lorozco@umd.edu) if needed for more details.