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Ohm's Law

staate the fa...

Question

staate the factors on which at a given temperature the resistance of a cylinderical conductor depends. State the SI unit of resistivity.

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Solution

The factors on which resistance depends is
(1) Temperature (T) - increases with T
(2) Type of material or its resistivity (Ï) - increases with Ï
(3) Cross-sectional area of cylinder (A) - decreases with A
(4) Length of cylinder (L) - increases with L
.
The SI unit of resistivity is Ohm-metre or Î©m.

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