Which is true? The net potential change around a closed circuit loop is zero. The net potential change counterclockwise around a closed circuit loop is positive. The net potential change clockwise around a closed circuit loop is positive.

The net potential change around a closed circuit loop is zero. This is absolutely true.

Explanation:

The net potential change around a closed circuit loop is zero because when a charge circulates around a close loop its potential energy changes because it moves round around the loop, but its net potential change is zero when it moves around a close loop.Because its initial and final positions are same.

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.