Resistance:

$\overline{){\mathbf{R}}{\mathbf{=}}{\mathbf{\rho}}\frac{\mathbf{l}}{\mathbf{A}}}$ where ρ is the resistivity, l is the length, and A is the cross-sectional area.

A = πr^{2}

Pencil "lead" is actually carbon. What is the resistance of the 0.760 mm-diameter, 7.00cm-long lead from a mechanical pencil?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Resistors and Ohm's Law concept. You can view video lessons to learn Resistors and Ohm's Law. Or if you need more Resistors and Ohm's Law practice, you can also practice Resistors and Ohm's Law practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Farooqi's class at TAMU.