A rectangular parallelopiped is measured as $1 cm \times 1 cm \times 100 cm$ . If its specific resistance is $3 \times 10^{- 7} Ω m$ , then the resistance between its two opposite rectangular faces will be _____ $\times 10^{- 7} Ω$ .

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It is given that l = 1 cm = 0 . 01 m A = 100 cm × 1 cm = 100 cm 2 ⇒ A = 0 . 01 m 2 ρ = 3 × 10 - 7 Ω m Using the formula of resistance, R = ρ l A = 3 × 10 - 7 × 0 . 01 0 . 01 = 3 × 10 - 7 Ω

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