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In a megger, the deflection of moving coil depends on-
- a)applied voltage
- b)inverse of applied voltage
- c)the ratio of currents in the coils
- d)the product of currents in the coils
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
In a megger, the deflection of moving coil depends on-a)applied voltag...
- Megger is used to measure the high insulation resistance
- The operating principle is the same as an ohmmeter
- The test voltages, usually 500, 1000 or 2500 V are generated by a hand driven PMDC generator
- The deflection of the moving coil depends on the ratio of currents in the coils
Most Upvoted Answer
In a megger, the deflection of moving coil depends on-a)applied voltag...
Moving Coil Deflection in a Megger
Theory
A megger is an instrument used for measuring insulation resistance. It consists of two coils - a fixed coil and a moving coil. When a voltage is applied to the fixed coil, it creates a magnetic field. This magnetic field causes the moving coil to move. The deflection of the moving coil is proportional to the insulation resistance being measured.
Dependence on Coils Currents
The deflection of the moving coil in a megger depends on the ratio of currents in the coils. The fixed coil is connected to a high voltage source, and the moving coil is connected to a low voltage source. The ratio of these currents is proportional to the insulation resistance being measured.
Explanation of Options
Option A: The deflection of the moving coil is not directly dependent on the applied voltage.
Option B: The deflection of the moving coil is not inversely dependent on the applied voltage.
Option C: The ratio of currents in the coils affects the deflection of the moving coil.
Option D: The product of currents in the coils does not affect the deflection of the moving coil.
Conclusion
In summary, the deflection of the moving coil in a megger is determined by the ratio of currents in the coils. This ratio is proportional to the insulation resistance being measured.
Theory
A megger is an instrument used for measuring insulation resistance. It consists of two coils - a fixed coil and a moving coil. When a voltage is applied to the fixed coil, it creates a magnetic field. This magnetic field causes the moving coil to move. The deflection of the moving coil is proportional to the insulation resistance being measured.
Dependence on Coils Currents
The deflection of the moving coil in a megger depends on the ratio of currents in the coils. The fixed coil is connected to a high voltage source, and the moving coil is connected to a low voltage source. The ratio of these currents is proportional to the insulation resistance being measured.
Explanation of Options
Option A: The deflection of the moving coil is not directly dependent on the applied voltage.
Option B: The deflection of the moving coil is not inversely dependent on the applied voltage.
Option C: The ratio of currents in the coils affects the deflection of the moving coil.
Option D: The product of currents in the coils does not affect the deflection of the moving coil.
Conclusion
In summary, the deflection of the moving coil in a megger is determined by the ratio of currents in the coils. This ratio is proportional to the insulation resistance being measured.
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In a megger, the deflection of moving coil depends on-a)applied voltageb)inverse of applied voltagec)the ratio of currents in the coilsd)the product of currents in the coilsCorrect answer is option 'C'. Can you explain this answer?
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