Hi, I am doing test corrections. I tried the problem again and I got (A), but I\

Question

Hi, I am doing test corrections. I tried the problem again and I got (A), but I'm not sure if that's right.

Version BE8 5. Wire A is made of copper, with a length of 2 m and diameter of 1 mm, at a temperature of 27 C. Wire B is made of copper, with a length of 1 m and a diameter of 2 mm, at a temperature of 27°C How does the resistivity of wire A compare to the resistivity of wire B? The resistivity of wire A is 8 times as large as the resistivity of wire B The resistivity of wire A is 2 times as large as the resistivity of wire B The resistivity of wire A is ½ as large as the resistivity of wire B The resistivity of wire A is the same as the resistivity of wire B The resistivity of wire A is 4 times as large as the resistivity of wire B B, D. E.

Explanation / Answer

formula for resitance is

R = rho L/A

resistivity of material is constant for particular material it doe not depend on the length or cross sectional area ( diameter) but it depends on temperatureof material. . since we used both wires are made by copper material and temeperate of both wire is same then the reisisvity of wire A is same as of wire B

hence option (D) is correct answer

Related Questions

Navigate

• Browse (All)
• Browse H
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.