A metal rod of length 10 cm and a rectangular cross-section of 1cm × \(\frac{1}{2}\) cm is connected to a battery across opposite faces. The resistance will be
1
maximum when the battery is connected across \(\rm 1cm \times\frac{1}{2}cm\) faces.
2
maximum when the battery is connected across 10 cm × 1 cm faces.
3
maximum when the battery is connected across \(\rm 10cm \times\frac{1}{2}cm\) faces.
4
same irrespective of the three faces.