Using the set$-$up from Problem $1,$ wire resistances are considered as $R_{Li}=\mathrm{.}55$ per wire $,$ or $3$ ; all have the same material, length, and same resistance$).$ Somehow heat came out, temperature rose and heated the instrumentation lead wires $(R_L)$ changing the resistance of each wire from $0\mathrm{.}55$ to $0\mathrm{.}59$ which yields $R_{Li}=0\mathrm{.}04\frac{}{?}$ wire.

What apparent strain will this give due to the temperature change, if a two$-$lead wire system were used?

What about a $3-$lead wire system?

Please relate the change in temperature to change in resistance of the lead wires and to the voltage measured across the Wheatstone bridge. Please provide brief explanations as to why the temperature change results in different strains for the two$-$lead wire vs$.$ the three$-$lead wire systems.