1.

In Wheatstone's bridge \[P=9\]ohm, \[Q=11\]ohm, \[R=4\]ohm and \[S=6\]ohm. How much resistance must be put in parallel to the resistance \[S\] to balance the bridge                                                                                              [DPMT 1999]

A.                    24 ohm                           
B.            \[\frac{44}{9}\]ohm
C.                    26.4 ohm                        
D.            18.7 ohm
Answer» D.            18.7 ohm


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