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- PHY102 Physics II © Dr.Cem Özdoğan
- A voltage of 100V is put over a thick wire of unknown material. The current is measured is 4.5x103 A. The cross section of the wire is 1cm2 and the length is 10 m. What material is the cable made of?
- R = V/I = 0.022 Ω = L/A =0.022A/L
- A=1cm2=0.0001m2 & L=10 m =2.2x10 -7 ohm.m Lead