exercise 8a numerical 12

Asked by nilesh.dhote74 | 10th May, 2020, 10:31: PM

Expert Answer:

What length of copper wire of resistivity 1.7 x 10-8 Wm and radius 1 mm is required so that its resistance is 1W.
 

Resistance (R) = 1 ohm

Resistivity (ρ) = 1.7 x 10-8 ohm metre

Radius (r) = 1 mm = 10-3 m

Length (l) = ?


Answered by Shiwani Sawant | 10th May, 2020, 11:01: PM