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Friction torque is eliminated by _________

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in Electrical Measurements by (148k points)
Friction torque is eliminated by _________

(a) using lubricating oil

(b) by suspending the components in air

(c) by adjusting the position of limb

(d) by using steel alloy components

I got this question in an interview.

My question is based upon Friction and Overload Compensation topic in section Measurement of Power and Related Parameters of Electrical Measurements

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The correct option is (c) by adjusting the position of limb

The explanation: We can eliminate the friction torque completely by adjusting the position of the shading loop. This enables in providing compensation for the frictional torque.

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