Rubbing a metal rod with wool does not result in a charge when the rod is held directly in hand due to the conductive nature of the human body, which allows charge to dissipate into the Earth. In contrast, when a metal rod with a wooden or plastic handle is rubbed without direct contact to the metal part, it retains charge because the handle acts as an insulator. This phenomenon is explained by the principles of conductivity and capacitance, where connecting the rod to the Earth increases capacitance, resulting in minimal potential change.
PREREQUISITESStudents of physics, educators teaching electrostatics, and anyone interested in the principles of electricity and charge behavior.
Just after posting the question I got the answer. But I didn't knew how to delete the thread which I created. Can you help me with this. By the way thanks for the answer.anuttarasammyak said:Hi. Charge leaves through your hand to Earth. Wood or plastic is insulator, hands are conductor.
Also : Connecting the rod to a body - or Earth will have the effect of vastly increasing the Capacitance and V=Q/C so the Potential change will be minuscule.anuttarasammyak said:Hi. Charge leaves through your hand to Earth. Wood or plastic is insulator, hands are conductor.