PH-1043
Resistance
Physics · Secondary 4 · Hard · Resistance
A 2.0 m long copper wire has a resistance of 0.40 Ω. Another copper wire has twice the length and half the cross-sectional area. What is the resistance of the second wire?
- 1.6 Ω
- 0.80 Ω
- 3.2 Ω
- 0.10 Ω
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