In an aluminum (Al) bar of square cross section, a square hole is drilled and is filled with iron (Fe) as shown in the figure, The electrical resistivities of Al and Fe are 2.7× 10 –8 Ω Ω m and 1.0 × 10 –7 Ω Ω m, respectively. The electrical resistance between the two faces P and Q of the composite bar is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
For Aluminium
For iron Fe
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