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The resistance of a straight conductor d...

The resistance of a straight conductor does not depend on its

A

length

B

temperature

C

material

D

shape of cross - section

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To solve the question regarding the factors that do not affect the resistance of a straight conductor, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Resistance**: - Resistance (R) is the opposition to the flow of electric current in a conductor. It is influenced by several factors. 2. **Resistance Formula**: - The resistance of a straight conductor can be expressed with the formula: \[ R = \frac{ML}{AN e^2 \tau} \] - In this formula: - \(M\) = mass of the electron (constant) - \(L\) = length of the conductor - \(A\) = cross-sectional area of the conductor - \(N\) = number density of charge carriers (depends on the material) - \(e\) = charge of the electron (constant) - \(\tau\) = relaxation time (depends on temperature) 3. **Factors Affecting Resistance**: - From the formula, we can see that: - Resistance depends on the **length** of the conductor (L). - Resistance depends on the **cross-sectional area** (A). - Resistance depends on the **nature of the material** (N). - Resistance depends on **temperature** (through \(\tau\)). 4. **Identifying Non-Dependent Factors**: - The question asks for what the resistance does not depend on. - The formula shows that resistance does not depend on the **shape** of the conductor. - Therefore, the correct answer to the question is that the resistance of a straight conductor does not depend on its shape. ### Conclusion: The resistance of a straight conductor does not depend on its shape. ---
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