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Which of the following materials would make an acceptable secondary barrier?

1) 1 and 2 only
2) 1 and 3 only
3) 2, 3, and 4 only
4) 1, 2, 3, and 4

User Bobrovsky
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1 Answer

5 votes

Final answer:

The resistance in wires depends on their length and cross-sectional area; a longer wire or one with a smaller cross-sectional area will have higher resistance, assuming the material is the same for all wires.

Step-by-step explanation:

Understanding Resistance in Parallel Wires

The question provided pertains to understanding how resistance in wires is affected by various physical parameters. Since all four wires are made of the same material, the factors that will affect resistance are the length and cross-sectional area of the wires, according to the formula for resistance R = ρ(L/A) where ρ is the resistivity, L is the length, and A is the cross-sectional area.

Without specific details on the dimensions or resistivity of the wires, we can't definitively answer which wire has greater resistance. However, we can state some general principles: a longer wire will have greater resistance, and a wire with a larger cross-sectional area will have less resistance, if the material is consistent across all wires.

Therefore, for resistance comparisons between wires:

If Wire 3 is longer than Wire 2, then Resistance of Wire 3 > Resistance of Wire 2.

If Wire 1 is shorter or has a greater cross-sectional area than Wire 2, then Resistance of Wire 1 < Resistance of Wire 2.

If Wire 1 is longer or has a smaller cross-sectional area compared to Wire 4, then Resistance of Wire 1 > Resistance of Wire 4.

If Wire 4 is shorter or has a larger cross-sectional area than Wire 3, then Resistance of Wire 4 < Resistance of Wire 3.

These resistance comparisons are based on the assumption that no other complicating factors are present.

User Mdelolmo
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