The metre wire of a metre bridge is made of mangnin or german silver , but is never made of copper . Why ?

Statement I : An alloy like manganin or German silver is used , instead of copper , as the materinal of the wire of a metre bridge . Statement II : The temperature coefficient of reistance is very low for alloys .

Which material is used for the metre bridge wire and why ?

Copper wire is not used as the bridge wire in a meter bridge because

A lump of copper is stretched into a wire 5mn in diameter. Another wire of 1 cm diameter is made from another lump of copper of the same mass. Find the ratio of the resistances of the two wires.

In the left gap of a meter bridge there is a coil of copper and in the right gap there is fixed resistance . If the coil of copper is dipped in ice the balance point is obtained at 41.2 cm of the bridge wire . Next the coil is taken of form ice and placed in a container of hoy water . Now the balcnce point is shifted by a distance 8.1 cm towards right . What is the temperature of hot water ? (Tempertaure cofficient of resistance of copper = 42.5xx10^(-4@)C^(-1) . )

A resistance of 1Omega is kept in the left gap of a metre bridge and another resistance of 3Omega is kept in the right gap . The left and right end errors of the metre wire are 3 cm and 1 cm respectively. The null point would be at

What do yo mean by end error of a metre bridge ? How can this error be remedied ?

The null point of a metre bridge is at 40 cm when resistance X and Y are placed in left and the right gaps , respectively . The following observations show the resistance in the left right gaps and the nul point respectively . Which of them are correct ?