Table of Contents
- 1 Where are Pmmc instruments used?
- 2 Why PMMC is not used for AC?
- 3 What is PMMC full form?
- 4 What is PMMC flap?
- 5 What is PMMC galvanometer?
- 6 What is RND medical?
- 7 What is the difference between the PMMC and the dynamometer?
- 8 What is the full form of RND?
- 9 What is the working principle of a PMMC instrument?
- 10 What is the function of the spring in PMMC?
Where are Pmmc instruments used?
The instrument that measures the current flowing in the coil from the pointer deflection is known as the PMMC instrument. It is also known as the D’Arsonval instrument or Galvanometer. These instruments are used in place of voltmeter and ammeters.
Why PMMC is not used for AC?
The reason you can’t use a PMMC with AC is because a PMMC, since it’s a moving mass, cant measure the instantaneous current, but rather measures the average current. The average current of an AC waveform is, of course, 0, so your meter will just read 0 the whole time.
What is PMMC full form?
A permanent magnet moving coil (PMMC) is one such instrument that is popularly used onboard and has several applications. The other popular nomenclature of this instrument is D’alvanometer and galvanometer.
What does PMMC stand for?
PMMC
| Acronym | Definition |
|---|---|
| PMMC | Profesinio Mokymo Metodikos Centras (Lithuanian: Methodological Center for Vocational Training) |
| PMMC | Providence Medford Medical Center (est. 1911; Medford, OR) |
| PMMC | Provena Mercy Medical Center (Aurora, IL) |
| PMMC | Permanent Magnet Moving Coil |
How does PMMC work on DC?
because pmmc instruments measure- avarage value and avarage value of a.c is zero so that ,pmmc Meter’s pointer does not move. PMMC type instrument uses two permanent magnets in order to create stationary magnetic field.
What is PMMC flap?
The pectoralis major myocutaneous (PMMC) flap has been used as a versatile and reliable flap since its first description by Ariyan in 1979. In India head and neck cancer patients usually present in the advanced stage making PMMC flap a viable option for reconstruction.
What is PMMC galvanometer?
A Permanent Magnet Moving Coil (PMMC) meter – also known as a D’Arsonval meter or galvanometer – is an instrument that allows you to measure the current through a coil by observing the coil’s angular deflection in a uniform magnetic field.
What is RND medical?
Reflex neurovascular dystrophy (RND) is a syndrome not infrequently found in adults. In adults, permanent radiographic changes often in- clude, severe generalized and periarticular osteoporo- sis, with irregular patterns of striation due to several different patterns of bone resorption (1,2).
Which torque is used in Pmmc meters movement?
Moderate torque is used in PMMC meter movement.
What is pedicle flap?
Listen to pronunciation. (PEH-dih-kul …) A type of surgery used to rebuild the shape of the breast after a mastectomy. Tissue, including skin, fat, and muscle, is moved from one area of the body, such as the back or abdomen, to the chest to form a new breast mound.
What is the difference between the PMMC and the dynamometer?
The difference between the PMMC and dynamometer type instrument is that the permanent magnet is replaced by an electromagnet. Principle of operation: When the current flows through the fixed coil, it produced a magnetic field, whose flux density is Proportional to the current through the fixed coil.
What is the full form of RND?
Research and Development (RnD or R&D) refers to the activities an organization undertake to innovate and introduce new products and services or to improve their existing offerings.
What is the working principle of a PMMC instrument?
The PMMC instrument working principle is when the torque is applied to the moving coil that is placed within the permanent magnet field, and then it gives a precise result for DC measurement. Working Principle of a PMMC Instrument
What are the disadvantages of PMMC instruments?
PMMC instruments are costlier. Aging of the instrument (permanent magnet and control spring) may introduce some errors. Permanent-magnet moving-coil instruments can be used as ammeters (with the help of a low resistance shunt) or as voltmeters (with the help of a high series resistance).
What is a permanent magnet moving coil (PMMC) meter?
What is a Permanent Magnet Moving Coil (PMMC)? A Permanent Magnet Moving Coil (PMMC) meter – also known as a D’Arsonval meter or galvanometer – is an instrument that allows you to measure the current through a coil by observing the coil’s angular deflection in a uniform magnetic field.
What is the function of the spring in PMMC?
The spring generally acts as control system for PMMC instruments. The spring also serves another important function by providing the path to lead current in and out of the coil. The damping force hence torque is provided by movement of aluminium former in the magnetic field created by the permanent magnets.