In the circuit above, your aim is to limit the current to , so you must design a resistor to serve in the place of .

To make this resistor, you have a spool of mystery metal, which has a cross sectional area of and a resistivity of, . What length of wire should you cut?

Which of the following factors would decrease the resistance through an electrical cord?

Two students are performing a lab using lengths of wire as resistors. The two students have wires made of the exact same material, but Student B has a wire the has twice the radius of Student A's wire. If Student B wants his wire to have the same resistance as Student A's wire, how should Student B's wire length compare to Student A's wire?

You have a very long wire connected to an electric station. Even though you are suppling 120V from the source, by the time it reaches the station, there is a loss of voltage. The wire is 100 meters long.

If reaches the power station, what is the resistivity of the wire? Assume a current of .

By how much will resistivity change if resistance and length are constant, and cross sectional area is doubled?

What is the current in a circuit with a resistor followed by a resistor that are both in parallel with a resistor? The voltage supplied to the circuit is 5V.

An electrician wishes to cut a copper wire that has no more than of resistance. The wire has a radius of 0.725mm. Approximately what length of wire has a resistance equal to the maximum ?

Find the resistivity of a cylindrical wire with resistance , length , and cross sectional area of .

Ratio is given by:

Resistivity of first resistor: Resistivity of second resistor

What is the ratio of resistivity of 2 resistors with identical resistances and area, where the first resistor is twice the length of the second resistor?

What is the resistance of a copper rod with resistivity of , diameter of , and length of ?