List of top Biomaterials Questions on Decay processes asked in GATE BM

A Wheatstone bridge is used to measure strain as shown in the figure below. 
Initially, the bridge was balanced. When a strain is applied to the resistor \( R_{{strain}} \), along its length, the output voltage \( V_{{out}} \) is 10 mV. If \( R_{{strain}} \) is a cylindrical resistor of length \( l \) and cross-sectional area \( A \), the magnitude of the applied strain is _______. 
(rounded off to two decimal places) 

 

Strength (\(\sigma\)) of an implanted suture is given by the equation \[ \sigma = \sigma_0 - 2 \log_e(t) \quad {for} \quad t \geq 1, \] where \(\sigma_0\) represents the original strength and time \(t\) is measured in weeks. If the strength of the suture is 2 MPa at 4 weeks, what will be its strength (in MPa) at 8 weeks? (Rounded off to two decimal places)
Strength (\(\sigma\)) of an implanted suture is given by the equation \[ \sigma = \sigma_0 - 2 \log_e(t) \quad {for} \quad t \geq 1, \] where \(\sigma_0\) represents the original strength and time \(t\) is measured in weeks. If the strength of the suture is 2 MPa at 4 weeks, what will be its strength (in MPa) at 8 weeks? (Rounded off to two decimal places)
A Wheatstone bridge is used to measure strain as shown in the figure below.
Initially, the bridge was balanced. When a strain is applied to the resistor \( R_{{strain}} \), along its length, the output voltage \( V_{{out}} \) is 10 mV. If \( R_{{strain}} \) is a cylindrical resistor of length \( l \) and cross-sectional area \( A \), the magnitude of the applied strain is _______.
(rounded off to two decimal places)
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The Electroencephalogram (EEG) voltage measured by a test device is 2.4 µV, while the reference device measured it to be 3.0 µV. What is the percentage error of the test device?