Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Questions  >  Electro dynamometer type of instruments are e... Start Learning for Free
Electro dynamometer type of instruments are enclosed in a casing made up of high permeability material to:
  • a)
    To remove electrostatic effects.
  • b)
    To provide mechanical strength to the coils present.
  • c)
    To protect against external magnetic fields.
  • d)
    Provide good damping
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Electro dynamometer type of instruments are enclosed in a casing made ...
Shielding of Electro dynamometer type instrument:
  • The magnetic field produced by the fixed coils in the Electro dynamometer type instruments is weaker than in other types of instruments such as PMMC. It is nearly 0.005 to 0.006 Wb/m2. 
  • In d.c. measurements even the earth's magnetic field may affect the readings. Thus it is necessary to shield an electrodynamometer type instrument from the effect of stray magnetic fields.
  • The stray magnetic field is around 0.0005 Wb/m2, which has a significant effect in the case of an electrodynamometer type instrument.
  • Air cored electrodynamometer type instruments are protected against external magnetic fields by enclosing them in a casing of high permeability alloy.
  • This shunts external magnetic fields around the instrument mechanism and minimizes their effects on the indication.
Free Test
Community Answer
Electro dynamometer type of instruments are enclosed in a casing made ...
Understanding Electro Dynamometer Instruments
Electro dynamometer instruments are widely used in the field of electrical engineering for measuring power, current, and voltage. One notable feature of these instruments is their casing, which is made from high permeability materials.

Purpose of High Permeability Casing
The primary function of enclosing electro dynamometer instruments in high permeability material is to:
  • Protect Against External Magnetic Fields: High permeability materials have the ability to redirect magnetic lines of force. This means they can shield the sensitive components of the instrument from external magnetic fields that might interfere with the accurate measurement of electrical parameters.
  • Minimize Measurement Errors: By shielding the instrument from stray magnetic fields, the high permeability casing helps maintain the integrity of the readings, ensuring that the instrument responds only to the intended magnetic fields generated by the current being measured.
  • Enhance Instrument Sensitivity: The presence of external magnetic fields can introduce noise and distortions in the readings. The high permeability casing mitigates these effects, allowing for more precise measurements.



Conclusion
In summary, the high permeability material used in the casing of electro dynamometer instruments primarily serves to protect against external magnetic fields. This feature is crucial for maintaining measurement accuracy and reliability, making it a vital design element in these instruments.
Explore Courses for Electrical Engineering (EE) exam

Top Courses for Electrical Engineering (EE)

Electro dynamometer type of instruments are enclosed in a casing made up of high permeability material to:a)To remove electrostatic effects.b)To provide mechanical strength to the coils present.c)To protect against external magnetic fields.d)Provide good dampingCorrect answer is option 'C'. Can you explain this answer?
Question Description
Electro dynamometer type of instruments are enclosed in a casing made up of high permeability material to:a)To remove electrostatic effects.b)To provide mechanical strength to the coils present.c)To protect against external magnetic fields.d)Provide good dampingCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Electro dynamometer type of instruments are enclosed in a casing made up of high permeability material to:a)To remove electrostatic effects.b)To provide mechanical strength to the coils present.c)To protect against external magnetic fields.d)Provide good dampingCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Electro dynamometer type of instruments are enclosed in a casing made up of high permeability material to:a)To remove electrostatic effects.b)To provide mechanical strength to the coils present.c)To protect against external magnetic fields.d)Provide good dampingCorrect answer is option 'C'. Can you explain this answer?.
Solutions for Electro dynamometer type of instruments are enclosed in a casing made up of high permeability material to:a)To remove electrostatic effects.b)To provide mechanical strength to the coils present.c)To protect against external magnetic fields.d)Provide good dampingCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE). Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of Electro dynamometer type of instruments are enclosed in a casing made up of high permeability material to:a)To remove electrostatic effects.b)To provide mechanical strength to the coils present.c)To protect against external magnetic fields.d)Provide good dampingCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Electro dynamometer type of instruments are enclosed in a casing made up of high permeability material to:a)To remove electrostatic effects.b)To provide mechanical strength to the coils present.c)To protect against external magnetic fields.d)Provide good dampingCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Electro dynamometer type of instruments are enclosed in a casing made up of high permeability material to:a)To remove electrostatic effects.b)To provide mechanical strength to the coils present.c)To protect against external magnetic fields.d)Provide good dampingCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Electro dynamometer type of instruments are enclosed in a casing made up of high permeability material to:a)To remove electrostatic effects.b)To provide mechanical strength to the coils present.c)To protect against external magnetic fields.d)Provide good dampingCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Electro dynamometer type of instruments are enclosed in a casing made up of high permeability material to:a)To remove electrostatic effects.b)To provide mechanical strength to the coils present.c)To protect against external magnetic fields.d)Provide good dampingCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
Explore Courses for Electrical Engineering (EE) exam

Top Courses for Electrical Engineering (EE)

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev