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Eddy current damping is not used on type instruments because
- a)the presence of a permanent magnet required damping would affect the deflection and reading of the instrument
- b)the presence of permanent magnet will result overheating of the coil
- c)uneven scale will be required and the instrument will require calibration every time
- d)excessive vibration will result in a disc due to eddy currents, thereby affecting the accuracy
Correct answer is option 'A'. Can you explain this answer?
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Eddy current damping is not used on type instruments becausea)the pres...
Introduction:
Eddy current damping is a technique used to provide damping in electrical measuring instruments. It works on the principle of electromagnetic induction, where the movement of a conductor through a magnetic field induces eddy currents in the conductor, which in turn produce a magnetic field that opposes the motion of the conductor. This opposing force helps in damping the motion of the instrument's moving parts.
Explanation:
Eddy current damping is not used in type instruments due to the following reason:
1. The presence of a permanent magnet required damping would affect the deflection and reading of the instrument:
In type instruments, the deflection of the moving coil or pointer is used to indicate the value being measured. The presence of a permanent magnet required for eddy current damping would create an additional magnetic field that would interfere with the deflection of the moving parts. This interference would result in inaccurate readings and affect the overall performance of the instrument.
Example:
For example, in a moving coil galvanometer, the deflection of the coil is directly proportional to the current passing through it. If eddy current damping is employed, the additional magnetic field created by the permanent magnet would oppose the deflection of the coil, resulting in a reduced deflection and inaccurate readings.
2. Other reasons:
The other options given in the question are not valid reasons for not using eddy current damping in type instruments.
- The presence of a permanent magnet does not result in overheating of the coil (Option B).
- Uneven scale and frequent calibration are not required for instruments using eddy current damping (Option C).
- Excessive vibration does not result in a disc due to eddy currents (Option D).
Conclusion:
Eddy current damping is not used in type instruments because the presence of a permanent magnet required for damping would affect the deflection and reading of the instrument. This interference with the moving parts would result in inaccurate readings and affect the overall performance of the instrument.
Eddy current damping is a technique used to provide damping in electrical measuring instruments. It works on the principle of electromagnetic induction, where the movement of a conductor through a magnetic field induces eddy currents in the conductor, which in turn produce a magnetic field that opposes the motion of the conductor. This opposing force helps in damping the motion of the instrument's moving parts.
Explanation:
Eddy current damping is not used in type instruments due to the following reason:
1. The presence of a permanent magnet required damping would affect the deflection and reading of the instrument:
In type instruments, the deflection of the moving coil or pointer is used to indicate the value being measured. The presence of a permanent magnet required for eddy current damping would create an additional magnetic field that would interfere with the deflection of the moving parts. This interference would result in inaccurate readings and affect the overall performance of the instrument.
Example:
For example, in a moving coil galvanometer, the deflection of the coil is directly proportional to the current passing through it. If eddy current damping is employed, the additional magnetic field created by the permanent magnet would oppose the deflection of the coil, resulting in a reduced deflection and inaccurate readings.
2. Other reasons:
The other options given in the question are not valid reasons for not using eddy current damping in type instruments.
- The presence of a permanent magnet does not result in overheating of the coil (Option B).
- Uneven scale and frequent calibration are not required for instruments using eddy current damping (Option C).
- Excessive vibration does not result in a disc due to eddy currents (Option D).
Conclusion:
Eddy current damping is not used in type instruments because the presence of a permanent magnet required for damping would affect the deflection and reading of the instrument. This interference with the moving parts would result in inaccurate readings and affect the overall performance of the instrument.
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Eddy current damping is not used on type instruments becausea)the presence of a permanent magnet required damping would affect the deflection and reading of the instrumentb)the presence of permanent magnet will result overheating of the coilc)uneven scale will be required and the instrument will require calibration every timed)excessive vibration will result in a disc due to eddy currents, thereby affecting the accuracyCorrect answer is option 'A'. Can you explain this answer?
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Eddy current damping is not used on type instruments becausea)the presence of a permanent magnet required damping would affect the deflection and reading of the instrumentb)the presence of permanent magnet will result overheating of the coilc)uneven scale will be required and the instrument will require calibration every timed)excessive vibration will result in a disc due to eddy currents, thereby affecting the accuracyCorrect answer is option 'A'. 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 Eddy current damping is not used on type instruments becausea)the presence of a permanent magnet required damping would affect the deflection and reading of the instrumentb)the presence of permanent magnet will result overheating of the coilc)uneven scale will be required and the instrument will require calibration every timed)excessive vibration will result in a disc due to eddy currents, thereby affecting the accuracyCorrect answer is option 'A'. 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 Eddy current damping is not used on type instruments becausea)the presence of a permanent magnet required damping would affect the deflection and reading of the instrumentb)the presence of permanent magnet will result overheating of the coilc)uneven scale will be required and the instrument will require calibration every timed)excessive vibration will result in a disc due to eddy currents, thereby affecting the accuracyCorrect answer is option 'A'. Can you explain this answer?.
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