Electronics and Communication Engineering - Measurements and Instrumentation - Discussion
Discussion Forum : Measurements and Instrumentation - Section 6 (Q.No. 23)
23.
A permanent magnet moving coil meter can be used as
Discussion:
13 comments Page 1 of 2.
S prabhakar said:
1 year ago
Permanent Magnet Moving Coil (PMMC) is only used for DC measurements, Moving Iron (MI) type instruments can be used for both AC & DC measurements.
Rectifier-type instruments are used for both AC & DC measurements. Induction-type instruments are only used for AC measurements.
Rectifier-type instruments are used for both AC & DC measurements. Induction-type instruments are only used for AC measurements.
Deepesh said:
10 years ago
Yes @Rit, it can only be used for dc measurement as during the negative half cycle of ac direction of torque applied will be reversed and average value of the applied torque during positive and negative half will be zero, and there will be no deflection in the pointer.
Electo said:
9 years ago
Yes, only DC but can be for low-frequency AC if used along with a rectifier type of instrument but in this question, the answer should be option B.
(1)
Rit said:
10 years ago
PMMC type can be used for direct current measurements only.
PPDV said:
5 years ago
I too agree, The correct answer must be B.
Ppdcet said:
4 years ago
I too agree, The correct answer must be B.
(1)
Matiullah said:
10 months ago
I think Option B is the correct answer.
Abhishek said:
6 years ago
Place only use for DC, not for ac.
PPDV said:
5 years ago
Yes, B is the answer. I too agree.
Ppkn said:
2 years ago
I think B is the correct answer.
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