Two metal wires of identical dimensions are connected in series. If 
and 
are the conductivities of the metal wires respectively, the effective conductivity of the combination is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
Net resistance of a metal wire having resistivity ρ, we have
Similarly, 
Then, net effective resistance of two metal wires,
As, conductivity, 
, we have
Net effective conductivity of combined wires,
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