PH-1044
Resistance
Physics · Secondary 4 · Medium · Resistance
A 3.0 m long copper wire has a resistance of 1.2 Ω. Another copper wire has the same cross-sectional area but is 7.5 m long. What is the resistance of the longer wire?
- 0.48 Ω
- 2.0 Ω
- 3.0 Ω
- 4.5 Ω
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