IPhO 2013, Експеримент — Задача 2.2. Characteristic of the solar cell

Solar cells — E2 · 7 юли 2013 г.

Warnings and notices

WARNING: Do not use the multimeter as an ohmmeter on the solar cells since the measuring current can damage them. When changing the measuring range on the multimeters, please turn the dial with caution. It can be unstable and may break. Check whether there is a number under the decimal point when measuring – if the dial is not fully in place, the multimeter will not measure, even if there are digits in the display.

Notice: Do not change the voltage on the power supply. It must be 12 V throughout the experiment. (The power supply for the light source should be connected to the outlet (230 V ~) at your table.)

Notice: Uncertainty considerations are only expected when explicitly mentioned.

Notice: All measured and calculated values must be given in SI units.

Notice: For all measurements of currents and voltages in this experiment, the LED-light source is supposed to be on.

Условие

Remove the circular aperture. Mount the variable resistor in the box as shown on Fig. 2.2. Place the light source in slot number 0, furthest away from the resistor. Mount solar cell A in the single holder without the circular aperture in slot number 10. Build a circuit as shown in Fig. 2.5, so that you can measure the characteristic of the solar cell, i.e. the terminal voltage UU of the solar cell as a function of the current II in the circuit consisting of solar cell, resistor and ammeter.

Circuit diagram: the solar cell (rectangle with − and + terminals) with a voltmeter V connected across its terminals, and in series a variable resistor R and an ammeter A; + signs mark the positive terminals of the meters.
Figure 2.5 Electrical diagram for measuring the characteristic in question 2.2.

2.2a Make a table of corresponding measurements of UU and II. [0,6 т.]

2.2b Graph voltage as function of current [0,8 т.]

Решение

Оригинал в Архива: exp2.pdf · официални решения: exp2_sol.pdf