Dimensions of a block are `1 cm xx 1 cm xx 100 cm`. If specific resistance of its material is `3 xx 10^(-7)`ohm-m, then the resistance between the opposite rectangular faces isA. `3 xx 10^-9 ohm`B. `3 xx 10^-7 ohm`C. `3 xx 10^-5 ohm`D. `3 xx 10^-3 ohm`

Dimensions of a block are `1 cm xx 1 cm xx 100 cm`. If specific resist

1.	Dimensions of a block are `1 cm xx 1 cm xx 100 cm`. If specific resistance of its material is `3 xx 10^(-7)`ohm-m, then the resistance between the opposite rectangular faces isA. `3 xx 10^-9 ohm`B. `3 xx 10^-7 ohm`C. `3 xx 10^-5 ohm`D. `3 xx 10^-3 ohm`
Answer» Correct Answer - B Between rectangular faces, `l = 1 cm, A = 100 cm^2` `R = (rho l)/(A) = (3 xx 10^-7 xx 1)/(100 xx 10^-2) = 3 xx 10^-7 ohm`.

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Dimensions of a block are `1 cm xx 1 cm xx 100 cm`. If specific resistance of its material is `3 xx 10^(-7)`ohm-m, then the resistance between the opposite rectangular faces isA. `3 xx 10^-9 ohm`B. `3 xx 10^-7 ohm`C. `3 xx 10^-5 ohm`D. `3 xx 10^-3 ohm`

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