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Least expensive instrument for dc measurement is
- a)Hot wire instrument
- b)Dynamometer type moving coil instrument
- c)Attraction type moving iron instrument
- d)Electrostatic type instrument
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Least expensive instrument for dc measurement isa)Hot wire instrumentb...
Answer:
Explanation:
The least expensive instrument for dc measurement is the attraction type moving iron instrument. The explanation for this is as follows:
Attraction Type Moving Iron Instrument:
- This type of instrument is commonly used for measuring dc currents and voltages.
- It consists of a stationary coil and a movable iron core.
- When a current flows through the coil, it produces a magnetic field that attracts the iron core towards it.
- The amount of attraction is proportional to the current flowing through the coil.
- The deflection of the iron core is measured using a pointer on a calibrated scale.
Advantages of Attraction Type Moving Iron Instrument:
- It is relatively inexpensive compared to other types of dc measurement instruments.
- It is simple in construction and easy to use.
- It has a wide range of measurement capabilities.
Disadvantages of Attraction Type Moving Iron Instrument:
- It has a low accuracy compared to other types of instruments.
- It is sensitive to external magnetic fields, which can affect its readings.
- It has a slow response time.
Conclusion:
In conclusion, the attraction type moving iron instrument is the least expensive instrument for dc measurement. However, it has some disadvantages such as low accuracy and sensitivity to external magnetic fields, which should be considered when choosing an instrument for a particular application.
Explanation:
The least expensive instrument for dc measurement is the attraction type moving iron instrument. The explanation for this is as follows:
Attraction Type Moving Iron Instrument:
- This type of instrument is commonly used for measuring dc currents and voltages.
- It consists of a stationary coil and a movable iron core.
- When a current flows through the coil, it produces a magnetic field that attracts the iron core towards it.
- The amount of attraction is proportional to the current flowing through the coil.
- The deflection of the iron core is measured using a pointer on a calibrated scale.
Advantages of Attraction Type Moving Iron Instrument:
- It is relatively inexpensive compared to other types of dc measurement instruments.
- It is simple in construction and easy to use.
- It has a wide range of measurement capabilities.
Disadvantages of Attraction Type Moving Iron Instrument:
- It has a low accuracy compared to other types of instruments.
- It is sensitive to external magnetic fields, which can affect its readings.
- It has a slow response time.
Conclusion:
In conclusion, the attraction type moving iron instrument is the least expensive instrument for dc measurement. However, it has some disadvantages such as low accuracy and sensitivity to external magnetic fields, which should be considered when choosing an instrument for a particular application.
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Least expensive instrument for dc measurement isa)Hot wire instrumentb)Dynamometer type moving coil instrumentc)Attraction type moving iron instrumentd)Electrostatic type instrumentCorrect answer is option 'C'. Can you explain this answer?
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