How does charging by conduction compare with charging by induction? a. a charged object is needed in conduction but not in induction. b. two neutral objects are needed in conduction but not in induction. c. objects must touch in induction but not in conduction. d. oppositely charged objects form in induction but not in conduction.

The correct answer is D.

Induction is the method of charging an object by bringing a charged object close to it without touching. See the given figure to know how is it done.

Conduction is the method of charging an object by touching it with a charged body. The charged body losses the charge and become neutral. The uncharged body gains the charge and become charged.

are their multiple choices ?

explanation:

none, its a machine