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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?
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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.
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.
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Electro dynamometer type of instruments are enclosed in a casing made ...
Understanding Electro Dynamometer Instruments
Electro dynamometer type instruments are crucial in measuring electrical parameters, such as current and voltage. Their design incorporates a casing made of high permeability material for specific functional benefits.
Purpose of High Permeability Material
- Magnetic Shielding: The primary function of enclosing electro dynamometer instruments in high permeability material is to protect against external magnetic fields. This shielding helps ensure that the measurements taken are accurate and not influenced by stray magnetic fields from nearby devices or environmental sources.
- Minimizing Interference: External magnetic fields can introduce errors in the readings of the instrument. By using high permeability materials, these instruments can maintain their sensitivity and precision, safeguarding the integrity of the measurements.
Additional Considerations
While the primary purpose is to protect against external magnetic fields, it is essential to consider other aspects as well:
- Mechanical Strength: Although the casing provides mechanical strength, this is not the primary reason for using high permeability materials. The material's magnetic properties take precedence.
- Damping: Damping is vital for the responsiveness of the instrument but is not directly related to the casing material. Damping mechanisms can be integrated independently of the material used for shielding against external influences.
- Electrostatic Effects: The high permeability casing does help to some degree with electrostatic effects, but its main function lies in magnetic protection.
In summary, the use of high permeability material in electro dynamometer instruments is primarily to protect against external magnetic fields, ensuring accurate and reliable measurements.
Electro dynamometer type instruments are crucial in measuring electrical parameters, such as current and voltage. Their design incorporates a casing made of high permeability material for specific functional benefits.
Purpose of High Permeability Material
- Magnetic Shielding: The primary function of enclosing electro dynamometer instruments in high permeability material is to protect against external magnetic fields. This shielding helps ensure that the measurements taken are accurate and not influenced by stray magnetic fields from nearby devices or environmental sources.
- Minimizing Interference: External magnetic fields can introduce errors in the readings of the instrument. By using high permeability materials, these instruments can maintain their sensitivity and precision, safeguarding the integrity of the measurements.
Additional Considerations
While the primary purpose is to protect against external magnetic fields, it is essential to consider other aspects as well:
- Mechanical Strength: Although the casing provides mechanical strength, this is not the primary reason for using high permeability materials. The material's magnetic properties take precedence.
- Damping: Damping is vital for the responsiveness of the instrument but is not directly related to the casing material. Damping mechanisms can be integrated independently of the material used for shielding against external influences.
- Electrostatic Effects: The high permeability casing does help to some degree with electrostatic effects, but its main function lies in magnetic protection.
In summary, the use of high permeability material in electro dynamometer instruments is primarily to protect against external magnetic fields, ensuring accurate and reliable measurements.
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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?
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