Question

A 1.60 m cylindrical rod of diameter 0.550 cm is connected to a power supply that maintains a constant potential difference of 14.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0 ∘C) the ammeter reads 18.3 A , while at 92.0 ∘C it reads 17.3 A . You can ignore any thermal expansion of the rod.

232 Electric Current Exercise 25.11 Constants PartA A 1.60 m cylindrical rod of diameter 0.550 cm is connected to a power supply that maintains a constant potential difference of 14.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0 °C) the ammeter reads 18.3 A, while at 92.0 ° C it reads 17.3 A .You can ignore any thermal expansion of the rod. Find the resistivity and for the material of the rod at 20 °C | ρ 1.14x10-5 Ω·m All attempts used; correct answer displayed ▼ Part B Find the temperature coefficient of resistivity at 20 °C for the material of the roc

Answer 1

en, Lonth o! 뻐.tr L-1.6m ·む A> wi Know 18-3 A 4- 仔. 3 1に6-30925 SL ad 92"C 4-