Question

# An $$8 \Omega$$ resistance wire is doubled up by folding. What is the new resistance of the wire?

A
0.5Ω
B
1.5Ω
C
2Ω
D
4Ω

Solution

## The correct option is C $$2\Omega$$Resistance of the conductor depends on the following factors: 1. Length of the conductor2. Area of the cross-section of the conductor3. Material used as a conductor.Resistance is directly proportional to the length of the wire, and inversely proportional to the cross sectional area of the wire.$$R=\rho \dfrac { L }{ A }$$ where R is resistance, $$\rho$$ is the material's resistance in ohms, $$l$$ is the length, and $$A$$ is the cross sectional area in $${m}^2$$.Physics

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