Machine-translated by Google. Questions are authored in English.
Top

Discussion

The graticule of an oscilloscope is marked on the inside surface of the screen in better instruments so as to avoid

  • A.parallax between the trace and the scale
  • B.the graticule being scratched during cleaning of the screen
  • C.reflections of the graticule lines from the phosphor behind it
  • D.the graticule obscuring part of the trace at high intensity

Answer: A

An external graticule sits a few millimetres in front of the phosphor, so the reading changes as the observer's eye moves. Marking it on the inner face puts scale and trace in the same plane and removes the error entirely.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.