Question

The torque in a rotating shaft is measured using strain gauges. The strain gauges, must be positioned on the shaft such that axes of the strain gauges are at

• A. 0° with respect to the axis of the shaft
• B. 30° with respect to the axis of the shaft
• C. 45° with respect to the axis of the shaft
• D. 90° with respect to the axis of the shaft

Answer 1

The correct option is C 45° with respect to the axis of the shaft

Strain gauges are positioned as 45° w.r.t. axis shaft to strain it in the direction of major axis and hence ensure maximum sensitivity.