An updated version of the AP Physics C reading chapter on current electricity. Section 24.14 has been significantly expanded to explain ammeters and voltmeters, their proper connection types (series vs. parallel), and the physics-based rationale (ideal resistance levels) for these choices. A refined Figure 24.6 illustrates correct meter placement, and the Wheatstone Bridge section has been removed to maintain focus. Content renumbering and structural flow have been optimized.