A metal rod of length 10 cm and a rectangular cross section of 1 cm × 
cm is connected to a battery across opposite faces. The resistance will be
A
Maximum when the battery is connected across 1 cm × 
cm faces.
cm faces.
B
Maximum when the battery is connected across 10 × 1 cm faces.
C
Maximum when the battery is connected across 10 cm × 
cm faces
cm faces
D
Same irrespective of the three faces.
Text Solution
Verified by ExpertsThe correct answer is:
A
As, 
resistance is maximum when l is large and A is least. For the given dimensions of wire, resistance will be maximum for l = 10 cm and
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