Saved Bookmarks
| 1. |
Calculate the resistance of 100 m long copper wire. The diameter of the wireis 1 mm, take rhow 1.7 x 10 power -8 ohm m. |
|
Answer» resistance = 40.8 OHM Explanation: the length = 100m diameter = 1mm = 0.001m radius = 0.0002m area of CROSS section = 0.00000004π m resistance = (1.7 *10^-8 *100)/0.00000004 ohm =(1.7*10^10 ) /4*10^8 ohm =(1.7*100)/4 ohm = 40.8 ohm |
|