Question

What is the value of resistance of 100m wire heaving cross sensational area 1.07cm and specific resistance of 1.72ओमसेंटीमीटर

Answer 1

The value of resistance is 160 ohm.

• The formula here we are using is Resistance, R=resistivity *length/area
• the length of the wire = 100 meters
• the cross-sectional area of the wire  = 1.07 centimeter =0.0107meter
• the specific resistance or resistivity of the wire = 1.72-ampere centimeter = 0.0172-ampere meter
• Therefore, the resistance, R = 0.0172*100/0.0107= 160 ohm.