If the torque/weight ratio of an instrument is low, then it can be concluded that

If the torque/weight ratio of an instrument is low, then it can be concluded that

Right Answer is:

The sensitivity of the meter will is low

SOLUTION

  • The torque/weight ratio of an instrument determines the sensitivity.
  • The frictional torque is dependent upon the weight of the moving parts and exerts a considerable influence on the performance of an indicating instrument and the deflection of the instrument will depend upon the frictional torque to a considerable extent.
  • The ratio of the deflecting torque to frictional torque is, therefore, a measure of the reliability of the instrument indication.
  • As the weight of the moving system is proportional to the frictional torque, therefore the (deflecting torque/weight) ratio of an instrument is an index of its performance and for better performance, this ratio should be higher.
  • It has been observed that this ratio should not be less than 0.1 for the satisfactory performance of the instrument.
  • The low torque/weight ratio signifies the heavyweight of the moving system due to which the instrument incurs frictional losses hence the sensitivity is low.
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