Final answer:
Objects acquire a temporary charge through charging by induction, where an object becomes charged by being in proximity to a charged object without direct contact. This is a temporary effect until the object is discharged or grounded.
Step-by-step explanation:
The kind of way where objects acquire a temporary charge is through charging by induction. When object A with an initial neutral charge comes in proximity to an object B that is already charged, object A can end up with a charge of the opposite sign without any direct contact by grounding it temporarily. In the case of being near a positively charged object, object A will become negatively charged, and vice versa. This method does not impart a permanent charge to the object unless it is connected to a source of charge or grounded.
Polarization is another temporary effect where objects have their charges rearranged (positive and negative charges concentrated in different areas) but overall remain neutral. An example of a temporary charge can be experienced when rubbing your feet against the carpet, which transfers electrons and causes a temporary negative charge to build up on your body until it is discharged, like when you touch a doorknob and feel a shock.