Bars of two different metals are bolted together , as shown in figure. The distance x does not change with temperature if :-

Two rods Aand B of different material are welded together as shown in figure . Their thermal conductivity of the composite rod will be:

V-i graph for a metal wire at temperature is as shown in figure

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K_(1) and K_(2) . The thermal conductivity of the composite rod will be

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K_(1) and K_(2) . The thermal conductivity of the composite rod will be

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K_(1) and K_(2) . The thermal conductivity of the composite rod will be

I-V graph for a metallic wire at two different temperatures T1 & T2 as shown in figure. Which of the two temperature is lower. Why ?

Two rods A and B of different materials are welded together shown in figure. Their thermal conductivities are K_1 and K_2 . The thermal conductivity of the composite rod will be: