A level Physics - The Potential Divider

In this video I go over the basics of the potential divider or rheostat.

[malaikaintisar]

Doesn't the sliding contact, divides the current? As some current may move from 0V to the sliding contact and some to the 12V end? Or all the current will move through the sliding contact?

[arslanmuhammadarslan]

thank you so much, give for information