(Solved): Question 4: The Wheatstone bridge circuit of the following figure has ratio arms \( \left(R_{2}\rig ...

Question 4: The Wheatstone bridge circuit of the following figure has ratio arms \( \left(R_{2}\right. \) and \( R_{3} \) of 5000 and 800 . A galvanometer with a resistance of 60 and a sensitivity of \( 0.05 \mu \mathrm{A} / \mathrm{mm} \) is connected between \( B \) and \( D \), and the adjustable resistance \( R 1 \) reads 340 . The galvanometer deflection is \( 35 \mathrm{~mm} \), and the battery voltage is \( 6 \mathrm{~V} \). Assuming no internal battery resistance, calculate the value of the unknown resistance \( R \). Repeat for \( R 2 \) and \( R 3 \) having values of 600 and 60 . respectively. Using the following equation: (5 Marks) \( R_{4}=\frac{E R_{1} R_{3}-i_{g}\left\lfloor R_{g} R_{1}\left(R_{2}+R_{3}\right)+R_{1} R_{2} R_{3}\right\rfloor}{i_{g}\left(1+R_{1}+R_{G}\right)\left(R_{2}+R_{3}\right)+E R_{2}} \)