The strain gauge forms one arm while three fixed value resistors (R1, R2 and R3) mounted on the other arms. The bridge is in balance when the strain gauge resistance is of its nominal value. The strain gauge has a nominal length of 5.2 cm and gauge factor

Question

Question

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	(a)	State two possible errors of the measurement.
		precision resistance tolerance
	(b)	Determine the nominal resistance of the strain gauge.
	(c)	Determine the change in resistance (DR) when the force is applied to the gauge.
	(d)	Determine the output voltage V_o and state whether the potential at node A is higher or lower than node B.
	(e)	Determine the resultant length of the strain gauge.
	(f)	Suggest one method to improve the accuracy and one method to improve the sensitivity of the bridge.

Answer 1