Please help answer Questions 3. and 5. Pa3.A 1.50-m cylindrical rod of diameter 0.500 cm is connected to a power supply thatmaintains a constant potential difference of 15.0 V across its ends, while an ammeter measures thecurrent through it. We observe that at room temperature (20.0°C) the ammeter reads 18.5 A, whileat 92.0°C it reads 17.2 A. We can ignore any thermal expansion of the rod. Findthe resistivity at 20.0°C andthe temperature coefficient of resistivity at 20.0°C for the material of the rod.a.b.5.R=100 2, R2=200 2, R3=300 N. What is the total resistance if these resistors are connected inseries? What is the resistance if these resistors are connected in parallel?→)

Answered: Image /qna-images/answer/8449fe3b-2e5f-4200-b137-90f5bbf316aa.jpg

A 1.50-m cylindrical rod of diameter 0.500 cm is connected to a power supply that maintains a constant potential difference of 15.0 V across its ends, while an ammeter measures the current through it. We observe that at room temperature (20.0°C) the ammeter reads 18.5 A, while 3. at 92.0°C it reads 17.2 A. We can ignore any thermal expansion of the rod. Find the resistivity at 20.0°C and a. b. the temperature coefficient of resistivity at 20.0°C for the material of the rod. 5. R=100 2, R2=200 2, R3=300 2. What is the total resistance if these resistors are connected in series? What is the resistance if these resistors are connected in parallel?