An electroscope is a device that detects charge on objects that touch it or are brought near it. John rubs a piece of cotton fabric on a plastic rod and then touches the rod to the electroscope. What methods of charging does John use?
Answer
A
John charges the rod through friction, then charges the electroscope through induction.
B
John charges the rod through friction, then charges the electroscope through conduction.
C
John charges the rod through induction, then charges the electroscope through friction.
D
John charges the rod through conduction, then charges the electroscope through induction.