You wish to use #18 tungsten wire at 20°c to make a 10 ω resistor. what length of wire will be required for this job? hint: be sure to use the k value found in the reference. (round the final answer to two decimal places.)

Length of the wire = 145.84 m

Step-by-step explanation:

Given : You wish to use #18 tungsten wire at 20°C to make a 10 Ω resistor.

To find : Length of wire will be required for this job.

Solution :

The #18 tungsten has a radius of .

The resistivity of the tungsten at 20° is .

The formula that relates resistance and resistivity is

where L is the length of the wire, R is the resistor,  its section and is the resistivity .

Now, we can calculate L :

Therefore, Length of the wire = 145.84 m