Solution Found!
Answer: A cylindrical copper cable 1.50 km long is
Chapter 25, Problem 74P(choose chapter or problem)
Problem 74P
A cylindrical copper cable 1.50 km long is connected across a 220.0-V potential difference. (a) What should be its diameter so that it produces heat at a rate of 75.0 W? (b) What is the electric field inside the cable under these conditions?
Questions & Answers
QUESTION:
Problem 74P
A cylindrical copper cable 1.50 km long is connected across a 220.0-V potential difference. (a) What should be its diameter so that it produces heat at a rate of 75.0 W? (b) What is the electric field inside the cable under these conditions?
ANSWER:
Solution 74P
Problem (a)
Step 1:
To find the diameter of the cable
Length of the cylindrical copper cable L = 1.5 km or 1500 m
Potential difference across the cable V = 220.0 V
Power produced by the heat P = 75.0 W
Resistivity of copper = 1.72 x 10-8