The high torque to weight ratio in an analog indicating instrument indicates

Electrical Engineering XYZ MCQs

The high torque to weight ratio in an analog indicating instrument indicates:

  1. Nothing related to friction loss
  2. Low friction loss
  3. High friction loss
  4. None of these

Correct answer: 2. Low friction loss

Explanation: The torque to weight ratio in an analog indicating instrument (such as meters used for electrical measurements) plays a critical role in determining the instrument’s sensitivity and accuracy. Torque in this context refers to the mechanical force applied by the instrument’s movement to overcome friction and other restraining forces to indicate a measurement. The weight typically refers to the mass of the moving parts in the instrument.

  1. High Torque to Weight Ratio: A high torque to weight ratio means that the torque generated by the instrument is high relative to the mass (weight) of the moving parts. This is desirable because it implies that the instrument can generate enough force to overcome the internal friction and other resistive forces more easily.
  2. Relation to Friction Loss: When an instrument has a high torque to weight ratio, it suggests that the device has enough mechanical power to smoothly and quickly move its pointer or indicator with minimal resistance from friction. This leads to low friction loss because the instrument’s mechanics are efficient enough to overcome friction without losing significant energy. Therefore, the high torque to weight ratio is indicative of low friction loss, ensuring quick, accurate, and reliable readings.
  3. Why not ‘High Friction Loss’ or ‘Nothing related to friction loss’?: If there were high friction loss, a high torque would be necessary just to overcome this friction, which would impair the instrument’s responsiveness and accuracy. Additionally, indicating that it has “nothing related to friction loss” would be incorrect as the torque to weight ratio directly affects how well an instrument can overcome frictional forces inherent in its mechanical parts. Thus, a high ratio favorably impacts performance by minimizing the effects of friction, which is crucial for precision instruments.

Therefore, low friction loss is the most accurate answer given the options, highlighting the importance of a high torque to weight ratio in enhancing the efficiency and accuracy of analog indicating

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