a student moves a charged needle near a neutr...
a student moves a charged needle near a neutral copper cylinder. which statement describes what will happen when the needle first touches the cylinder? a the charge will be forced out of the needle and into the air through induction. b repulsion between the needle and the cylinder will keep them from actually touching. c the needle will become positively charge through friction. d electrons will flow from the needle to the cylinder through conduction.
Answer
# Brief Explanations:
When a charged object (the needle) touches a neutral conductor (the copper - cylinder), electrons will flow from the charged object to the neutral conductor through conduction. Induction is the process of charging an object without contact, so option A is incorrect. Repulsion would occur if both were charged with the same - type charge before contact, but here the cylinder is neutral initially, so option B is incorrect. Friction is not relevant in this scenario as there is no rubbing action to create a charge, so option C is incorrect.
# Answer:
D. Electrons will flow from the needle to the cylinder through conduction.