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