The hand holding the bar, with silk friction, the root of copper with what power
Copper with fur to friction due to charge, the bar and the people are conductors, easy conductive copper and body to charge through the earth, the final copper is not charged. So the answer is: must not be charged.
Copper with fur to friction due to charge, the bar and the people are conductors, easy conductive copper and body to charge through the earth, the final copper is not charged. So the answer is: must not be charged.
Copper with fur to friction due to charge, the bar and the people are conductors, easy conductive copper and body to charge through the earth, the final copper is not charged. So the answer is: must not be charged.
