RF & Wireless — question 1 of 10
Write a real answer. It is graded against the question's rubric, and the mastery movement is computed by the same engine the product uses. Scoring here is deterministic rather than model-written, so this page costs nothing to run and nothing is saved. In a track built from your own posting, the same rubric is graded by the model, which is what produces feedback about your reasoning rather than about coverage.
You're testing a small wireless sensor board with a printed PCB antenna. Sitting on a table it gets great range, but the moment you pick it up and hold it in your hand, the range drops noticeably. Why does this happen, and what does it tell you about how the antenna is actually working?