Dimensions of a block are 1 cm × 1 cm × 100 cm . If specific resistance of its material is 3 × 1 0 − 7 Ω m , then the resistance between the opposite rectangular faces is

Here length l = 1 cm = 1 0 − 2 m Area of cross-section, A = 1 cm × 100 cm = 1 0 − 2 m 2 Resistance, R = ρ A ℓ = 3 × 1 0 − 7 × 1 0 − 2 1 0 − 2 = 3 × 1 0 − 7 Ω

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PhysicsCurrent ElectricityEquivalent ResistanceEasy2 minPYQ_2011

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Dimensions of a block are $1 cm \times 1 cm \times 100 cm$ . If specific resistance of its material is $3 \times 1 0^{- 7} Ω m$ , then the resistance between the opposite rectangular faces is

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Solution:

Here length $l = 1 cm = 1 0^{- 2} m$ Area of cross-section, $A = 1 cm \times 100 cm = 1 0^{- 2} m^{2}$
Resistance, $R = ρ \frac{ℓ}{A} = 3 \times 1 0^{- 7} \times \frac{1 0 ^{- 2}}{1 0 ^{- 2}}$ $= 3 \times 1 0^{- 7} Ω$

Stream:VITEEESubject:PhysicsTopic:Current ElectricitySubtopic:Equivalent Resistance

⏱ 2mℹ️ Source: PYQ_2011

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