Imagine you’re jumping rope. The rope goes up, then down, then up, then down—just like AC voltage, which flips direction 50 or 60 times a second. If you measured the rope’s height at its highest point, you’d get the peak. But that’s misleading.
You don’t spend all your time at the peak of the jump. Most of the time, you’re somewhere in the middle, feeling the steady rhythm. RMS voltage is like the average height of your jump over a full cycle—the number that tells you how much work your legs are actually doing.
It’s the difference between bragging about your highest jump and knowing how tired you’ll be after ten minutes. Life’s about what’s steady, not what’s flashy.