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PMMC Instrument Part 1 (in Hindi)
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In this lesson I've discussed basic introduction about PMMC instrument.

Pawan Chandani
Faculty of GATE/ESE (Electrical Engineering) , Also a YouTuber and teaches Electrical Eng. subjects on YouTube | Jony Ive Award Winner

U
Unacademy user
Sr
very use full lecture sir for me..............i m so happy ,,,,,,fentastic lecture thank u sir
Ds
sir I just want to ask sir for university exam should I follow this whole course sir for IN branch.
Pawan Chandani
4 months ago
Absolutely...
RA
Eddy current produce due to time varying flux i.e AC in nature.If it is connected accross DC voltage , it will behave as a magnet and flux remains constant due to DC supply.How EDDY current will produce and oppose this motion.Sir correct me if I am wwrong.
Pawan Chandani
a year ago
Here eddy current induced due to motion of the coil not due to time varying flux because According to Faraday's law there should be relative motion between conductor or flux...either flux will be time varying or conductor will move...ok...so here flux is constant because we have used permanent magnet...ok and according to Lenz law resultant always opposes it's cause...so here cause of induction is Motion of the coil or former.....so induced eddy current opposes the motion of the former so that we get damping torque...thats simple.
RA
Rezwan Ahemmed
a year ago
Thank you so much.
Pawan Chandani
a year ago
welcome...then plz do rate and review this course
RA
Rezwan Ahemmed
a year ago
Sir,please complete this EEM course according to GATE and ESE syllabus.Your explanation was very good.After completing this EEM course ,post more question related to EEM.
Pawan Chandani
a year ago
sure :)
sir please confirm me whether it is Eddy current damping or electromagnetic damping in pmmc??
Pawan Chandani
10 months ago
damping technique that we use in pmmc instrument is Eddy current damping. but mechanism of both the damping that is Eddy current and electromagnetic damping are same in one damping torque is proportional to current and in another damping torque is proportional to voltage. sometimes in options when Eddy current damping is not present then we should mark electromagnetic damping. but most correct answer is Eddy current damping.
Akarsh Kumar
10 months ago
thank you
sir ei walo ke liye yeah sahi hain?
Pawan Chandani
9 months ago
yes perfect hai
DS
HELLO SIR , HERE U TOLD THAT FORMAR CUT THE FLUX , MEANS ? and sir here magnetic flux is change with time so that emf is induced E=-(dphi/dt)and i=(E/r) i.e. eddy current? sir give me comment if i am wrong.
Pawan Chandani
a year ago
I am not understanding what you want to ask me.... please clearly mention which point you are not getting.... you can ask your query in Hindi also.
  1. Electrical & Electronics Measurements (Part 2) By- Pawan Chandani


  2. Hello! - Pawan Chandani Done B. Tech from RTU University from EE department "Two times GATE and SSC JE qualified. Providing Coaching for GATE and ESE aspirant in EE stream. .Provide Content of Electrical on YOUTUBE. -You can follow me at: https://unacademy.com/user/pawanchandani1990


  3. Electrical & Electronics Measurements (Part 2) By- Pawan Chandani


  4. Target Audience . Strictly For GATE (EE), (EC) Aspirants Electrical Engineering Students Students who are preparing for other competitive Exams for Electrical & Electronics Engineering


  5. Course Structure . Introduction of PMMC Instruments. Derive Deflecting Torque Equation of PMMC instruments Features of PMMC Instruments Disadvantage of PMMC Instruments Enhancement of Ammeter Effect of Temperature of PMMC Instruments Enhancement of Voltmeter Sensitivity Loading Effect


  6. Course Structure Rectifier Type Instruments Half Wave Rectifier Meter Full Wave Rectifier Meter Error Due to callibration


  7. PMMC Instruments Scale S1 pointer Permanent Magnet


  8. PMMC Instruments Scale Readin S1 pointere teimanent Magnet -Moving Coll Permanent Magnet


  9. PMMC Instruments Conlrollin Tor ue Scale Keadin Al pointer teimanent Magnet Movina Coil Permanent Magnet oren


  10. Pawan Chandani comment To get notification (Hindi) Electrical and Electronic Measurements 4.7 (14 ratings 3 reviews) Pawan Chandani Enroll 49 Add to list