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Q10CQ

Expert-verifiedFound in: Page 731

Book edition
1st Edition

Author(s)
Paul Peter Urone

Pages
1272 pages

ISBN
9781938168000

**Does the resistance of an object depend on the path current takes **

**through it? Consider, for example, a rectangular bar—is its resistance **

**the same along its length as across its width?**

Yes, an object's resistance can be affected by the current path it travels. If the

increase in L is greater than the increase in A, the resistance will rise, and vice

versa.

**In an electrical circuit, resistance is a measure of the resistance to current **

**flow. The Greek letter omega (Ω) is used to represent resistance in ohms.**

Yes, an object's resistance varies along its length and width. An item with a length L

and a cross-sectional area A has a resistance R of:

$\mathrm{R}=\frac{\mathrm{\rho L}}{\mathrm{A}}$

In the rectangular bar example, the resistance will increase if the increase in L is

greater than the increase in A, and vice versa.

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