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A rectangular block has dimensions 5cmxx...

A rectangular block has dimensions `5cmxx5cmxx10cm`. Calculate the resistance measured between (a) two square ends and (b) the opposite rectangular ends. Specific resistance of the material is `3.5xx10^(-5)Omegam`.

Text Solution

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(a) Resistance between two square ends `R_(1) =(rhol)/A`
`R_(1) =(3.5 xx 10^(-5) xx 10 xx 10^(-2))/(5 xx 5 xx 10^(-4)) = 1.4 xx 10^(-3) Omega`

(b) Resistance between the opposite rectangular ends `R_(2) =(rho l)/A`
`R_(2) =(3.5 xx 10^(-5) xx 5 xx 10^(-2))/(5 xx 10 xx 10^(-4)) = 1.4 xx 10^(-4) Omega`
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