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- PHY102 Physics II © Dr.Cem Özdoğan
- Rank them according to the power dissipated by them, greatest first, when the same potential difference V is placed across their lengths.
- Step I: The resistivity ρ is the same (all three are copper). Find the Resistance R=ρL/A for each case:
- Ranking is reversed since R is downstairs.
- 26-7 Power in Electric Circuits
- Step III: Rank the power using P=V2/R since V is same.
- Step II: Rank the current using V=iR or i=V/R with V constant!