Исследование электрических свойств простого карандаша
The group of physicists from the secondary school. Rastopulovka multimeter shows nothing when measuring the resistance of 2D-resistor ... Why? The first thing that comes to mind - the toggle switch for 2000 ohms (usually fixed very high resistance). The second - to move the test leads, look for a place that was still reading. Third, draw a "fatter" ... In any case, the result should be tested more than once ... Good luck!