Answer:
b) True Only if the finger is isolated from ground
c) True. The total charge does not change since the system is isolated
Explanation:
When the electroscope is touched with an acrylic rod, some charges are transferred from the electroscope to the rod, until the charge in both is equal.
In the case it know when the electroscope is touched with a finger, two things can happen.
- The body is isolated from the ground, the efective charge is redistributed between the two bodies. Case similar to insulating rod
- The body is connected to ground, the charge is transferred to the finger and from here to the ground until the total charge is transferred and the Earth and the final charge of the electroscope is zero.
Let's review the final statements
a) False, when part of the load is touched, it passes to the rod, so when it separates it does not return to the initial load
b) True Only if the finger is isolated from ground
c) True. The total load does not change since the system is isolated
d) False. The value of the load changes =, but its sign does not
