How do you compute that area though? The problem gives the radius and length of the wire, as well as the shape, but I'm not sure how to use that information to compute an area.
Homework Statement
You have a 25 mm long cylindrical carbon resistor, with a cross-section of radius 15·10-6 m.
What is its resistance?
Homework Equations
Resistance = pL/A where p is the resistivity of the material, L is the length, and A is the area(?).
Also, given is that...
Homework Statement
The terminals A and B in Figure 21-31 are connected to a 9.0 V battery, where R1 = 1.8 and R2 = 3.2 .
Here is diagram of the circuit: http://www.webassign.net/walker/21-30alt.gif
I must find the current flowing through every resistor on the circuit.
Homework...