Physics · Current Electricity

A solid cube of a material has resistivity ρ (Ω·m) and a uniform cross-sectional area 'a' (m 2 ). What is the electrical resistance R (Ω) of this cube between two opposite parallel faces?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

Correct answer

R = ρ / √a

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A solid cube of a material has resistivity &rho; (&Omega;&middot;m) and a uniform cross-sectional area 'a' (m 2 ). What is the electrical resistance R (&Omega;) of this cube between two opposite parallel faces?