In the strain gauge bridge circuit given below, R1 = R3 = R (1 − x) and R2 = R4 = R (1 + x), where R is 350 Ω. The voltage sources vs and vn represent the dc excitation and the undesired noise/interference, respectively. The value of capacitor C in microfarad that is required to ensure that the output across a and b is low-pass filtered with a cutoff frequency of 150 Hz is ________.
Enter numerical value using the virtual keypad. Round off where necessary.