A metal rod of length 10 cm and a rectangular cross-section of $1 \text{ cm} \times \frac{1}{2} \text{ cm}$ is connected to a battery across opposite faces. The resistance will be:

Question

Same irrespective of the three faces.

Maximum when the battery is connected across $1 \text{ cm} \times \frac{1}{2} \text{ cm}$ faces.

Maximum when the battery is connected across $10 \text{ cm} \times \frac{1}{2} \text{ cm}$ faces.

Maximum when the battery is connected across $10 \text{ cm} \times 1 \text{ cm}$ faces.

Solution

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