(Solved): Q2: for wheatstone bridge with R1=R2=R3=R4=120 resistances and a 10V supply . i ...

Q2: for wheatstone bridge with $R_1=R_2=R_3=R_4=120\Omega$ resistances and a $10\mathrm{V}$ supply . if a $4\frac{1}{2}$ digit DVM on a $2000\mathrm{mV}$ scale is used for null detector . find the resistance resolution for the measurement of $R_4$ Q3: design a twin-T notch filter to reduce and eliminate the 240 $\mathrm{Hz}$ signal also find the low edge frequency and the high edge frequency for this filter for which the output is down by $3\mathrm{dB}$ Q4: A signal conditioning system uses a frequency variation from $6\mathrm{kHz}$ to $60\mathrm{kHz}$ to carry measurement information and there is a noise at $120\mathrm{Hz}$ and at $1\mathrm{MHz}$. design a band pass filter to reduce the noise by $80\%$ ( take $\mathrm{r}=0.01$ and $R_L=$ $120k\Omega )$