39\frac{\rho b}{ac}
the dimensions of conductor of specific resistance Ï is shown above what is the resistance across AB ?
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11 Answers
11Generally R=\frac{\rho (length)}{Area of cross section}
Apply this here
11Length is to be taken along the direction which current will flow when the resistor is connected to a battery
3see current is flowing from A to B.so the length is along the current flow direction bcos they are the terminals.current will flow from positive to negative potential.