A metal rod of length 10 cm and a rectangular cross-section
of 1cm × 1/2 cm is connected to a battery across opposite
faces. The resistance will be
(a) maximum when the battery is connected across 1 cm ×
1/2 cm faces
(b) maximum when the battery is connected across 10 cm ×
1 cm faces
(c) maximum when the battery is connected across 10 cm ×
1/2 cm faces
(d) same irrespective of the three faces
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