$3\mathrm{.}2.$ To increase the circuit sensitivity$,$ the voltage can be varied in the quarter bridge, shown in Fig. P$3\mathrm{.}2.$ The active gage is a $350-$ gage dissipating $0\mathrm{.}05-W$ power with a gage factor of $2\mathrm{.}12.$ Calculate the required voltage to be applied to the bridge and the resulting circuit sensitivity$.$

FIGURE P$3\mathrm{.}2$