Sofia Branch (SB) of
the Union of Physicists in Bulgaria (UPB), together with the Society of
Physicists of Macedonia (SPM) and Regional Society of Physicists from Strumica
(RSPS) are organizing the 9 The Olympiad will be
held in a hybrid mode: online and on-site participation, and the ranking will
be separate for the two different modes. The Olympiad will be held on
Online participants will receive the experimental set-ups by conventional mail prior to the Olympiad. The task of the Olympiad will be available online and sent by e-mail at the day of the Olympiad at 11:00 Central European Time (CET) (12:00 Sofia time). Students must have 2 multimeters, a calculator, squared paper (graph paper), writing paper, and a pen. Online participants must take photos or scan their work and send it to the email epo@bgphysics.eu by 15:00 CET, i.e. 4 hours from the beginning of the Olympiad. Information for the on-spot Olympiad held simultaneously in Skopje, R. N. Macedonia will be announced later.
2) The Olympiad round
will be held on 8
On-spot participants will receive the set-ups at the place of the Olympiad in Skopje, which will be described in detail later.
n=1,2,
… , N; and then graphically. For each of those N
measurements, plot the experimental point on squared paper, with the current
horizontally (abscissa) and the voltage vertically (ordinate). Draw a line of
best fit. At the ends of this line, select two points A and B and measure the
differences of their voltage ∆U=U_{B}-U_{A} and their current ∆I=I_{B}-I_{A,} and calculate the ratio R= ∆U/∆I. What is the dimension of this slope
of the line? What law did you measure, and what accuracy did you achieve? Older
students can compare the graphical solution with the results of the linear
regression calculated from the experimental data. This is a good estimate of
the error in processing experimental data. If you can find some light emitting diodes
(LED), measure the relationship between current and voltage I(U).
The current from the batteries must always pass through a protective resistance
of at least 20 Ω, because the diodes can be burnt easily. Draw carefully
the dependence of current as a function of voltage I(U) when current is less
than 10 μA.
Bank: UniCredit Bulbank, Sveta Nedelya Branch, Sofia Beneficiary: Union of Physicists of Bulgaria IBAN: BG91UNCR70001520373231 SWIFT (BIC): UNCRBGSF Street Address: 7 Sveta Nedelya Square, BG-1000 Sofia, Bulgaria. Reason for the transaction: support for Experimental Physics Olympiad
Updated information can be found on the website of the SB of UPB https://sites.google.com/a/bgphysics.eu/bgphysics/deynosti/epo . Please spread this message among students and teachers.
With best regards,
EPO, 14 June, 2021 |

Дейности >