NDA 2023 Physics question
Which of the following statements are correct about the electrical resistance and resistivity of a wire ? 1. Both quantities depend on the area of cross-section of the wire 2. Both depend on the temperature 3. Resistance of the wire is directly proportional to the resistivity of the wire 4. Resistivity of the wire is directly proportional to the length of the wire Select the correct answer using the code given below :
Answer: (C)
Solution
. Resistance depends on length and area, but resistivity is a property of the material and does not depend on the dimensions of
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