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Guard circuits are used in insulation resistance measurements to
- a)increase the range of resistance values measured
- b)reduce the effect of leakage current on measurement
- c)protect against external electric fields
- d)protect against external magnetic field
Correct answer is option 'B'. Can you explain this answer?
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Guard circuits are used in insulation resistance measurements toa)incr...
Insulation resistance measurements are used to determine the ability of insulating materials to resist the flow of current. Leakage current, which is the current that flows through the insulation material, can affect the accuracy of the measurement. Guard circuits are used to reduce the effect of leakage current on the measurement.
Guard circuits work by creating a low resistance path between the conductor and the ground. This path provides a low resistance route for the leakage current to flow, reducing the amount of current that flows through the insulation material. This helps to minimize the effect of leakage current on the measurement.
There are several benefits to using guard circuits in insulation resistance measurements:
1. Increased accuracy: By reducing the effect of leakage current, guard circuits can improve the accuracy of the measurement.
2. Increased sensitivity: Guard circuits can allow for more sensitive measurements, as they can reduce the noise in the measurement signal.
3. Increased range: Guard circuits can increase the range of resistance values that can be measured, as they can help to minimize the effect of leakage current on the measurement.
4. Protection against external factors: Guard circuits can also protect against external electric fields, which can affect the accuracy of the measurement.
In summary, guard circuits are an important tool in insulation resistance measurements. They can help to reduce the effect of leakage current on the measurement, improve accuracy, increase sensitivity, and protect against external factors.
Guard circuits work by creating a low resistance path between the conductor and the ground. This path provides a low resistance route for the leakage current to flow, reducing the amount of current that flows through the insulation material. This helps to minimize the effect of leakage current on the measurement.
There are several benefits to using guard circuits in insulation resistance measurements:
1. Increased accuracy: By reducing the effect of leakage current, guard circuits can improve the accuracy of the measurement.
2. Increased sensitivity: Guard circuits can allow for more sensitive measurements, as they can reduce the noise in the measurement signal.
3. Increased range: Guard circuits can increase the range of resistance values that can be measured, as they can help to minimize the effect of leakage current on the measurement.
4. Protection against external factors: Guard circuits can also protect against external electric fields, which can affect the accuracy of the measurement.
In summary, guard circuits are an important tool in insulation resistance measurements. They can help to reduce the effect of leakage current on the measurement, improve accuracy, increase sensitivity, and protect against external factors.
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Guard circuits are used in insulation resistance measurements toa)increase the range of resistance values measuredb)reduce the effect of leakage current on measurementc)protect against external electric fieldsd)protect against external magnetic fieldCorrect answer is option 'B'. Can you explain this answer?
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