In a metre bridge, what is the effect on null deflection of galvanometer, when the radius of the meter bridge wire is doubled?

For a balanced Meter Bridge $\mathrm{P}/\mathrm{Q}={\mathrm{L}}_1/\left(100-{\mathrm{L}}_1\right)$
There is no parameter related to the radius of the wire. So, the null deflection of galvanometer does not depend on the radius of the wire. So, even if the radius of the wire is doubled, the null deflection of the galvanometer will not be changed.