Question

Three metal rods of same length and cross section area having conductivities 1,2,3units are connected in series. Their effective conductivity

Answer 1

Answer:

Conductivity adds up just like how electrical resistances add up.

and hence because the three metal rods of individual conductivities are conncected in series here,

The effective conductivity,

k = k1+k2+k3 units.

Hope this helps you !