The gain of the differential amplifier is -125. Assume the voltage applied to bridge circuit Vdc=+10v and the unstrained resistance of four element of strain gage is 200‚âà√≠¬¨¬©. When a certain weight is placed on the platform, the output voltage Vo=5v. Determine the change in resistance of each strain gage for analog weight scale. (Assuming the output is initially nulled).$

The gain of the differential amplifier is -125. Assume the voltage app

1.	The gain of the differential amplifier is -125. Assume the voltage applied to bridge circuit V_dc=+10v and the unstrained resistance of four element of strain gage is 200‚âà√≠¬¨¬©. When a certain weight is placed on the platform, the output voltage V_o=5v. Determine the change in resistance of each strain gage for analog weight scale. (Assuming the output is initially nulled).$
A.	1‚âà√≠¬¨¬©
B.	0.8‚âà√≠¬¨¬©
C.	0.3‚âà√≠¬¨¬©
D.	1.83‚âà√≠¬¨¬©
Answer» C. 0.3‚âà√≠¬¨¬©