Which of the following is an advantage of PMMC instruments?

Which of the following is an advantage of PMMC instruments?

Right Answer is:

All of the above

SOLUTION

PMMC (Permanent Magnet Moving Coil) instruments have all the listed advantages:

  • They have a uniform scale: PMMC instruments have a uniformly divided scale because the instrument’s response is directly proportional to the deflection of the pointer. The scale may be very long, over about 250 or 270 degrees.
  • They consume less power: PMMC instruments consume low power.
  • They have efficient damping: PMMC instruments have efficient damping characteristics and are not affected by stray magnetic fields. The damping torque is generated by the motion of the aluminum coil former within the magnetic field, reducing unwanted oscillations in the pointer

Start typing and press enter to search

Scroll to Top