In case of the Wheatstone bridge shown in the below circuit diagram P = 3 kΩ and Q = 5 kΩ. The null value for the galvanometer is obtained when S = 6 kΩ. Find the value of R and the resistance measurement range of the bridge if ‘S’ value varies from 1 kΩ to 8 kΩ

• A. \(\begin{array}{*{20}{l}} {R\; = \;2.6\;k\Omega }\\ {S = 500\;{\rm{\Omega \;}}to\;3.8\;k\;{\rm{\Omega }}} \end{array}\)
• B. \(\begin{array}{*{20}{l}} {R\; = \;5.6\;k\Omega }\\ {S = 400\;{\rm{\Omega \;}}to\;5.8\;k\;{\rm{\Omega }}} \end{array}\)
• C. \(\begin{array}{*{20}{l}} {R\; = \;1.6\;k\Omega }\\ {S = 500\;{\rm{\Omega \;}}to\;5.8\;k\;{\rm{\Omega }}} \end{array}\)
• D. \(\begin{array}{*{20}{l}} {R\; = \;3.6\;k\Omega }\\ {S = 600\;{\rm{\Omega \;}}to\;4.8\;k\;{\rm{\Omega }}} \end{array}\)