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

Question

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

MARKS App · Accepted Answer

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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