Ask Question
15 February, 02:55

When a potential difference of 12 v is applied to a wire 6.8 m long and 0.35 mm in diameter the result is an electric current of 2.1

a?

+4
Answers (1)
  1. 15 February, 03:19
    0
    The total resistance is R = voltage / current

    This resistance R = (L/A) r where:

    r is the resistivity

    L is the length of the conductor

    A is the cross-sectional area of the conductor.

    thus r = RA/L

    You are given L; you can compute R from the voltage and current you are given; and the cross-sectional area of a round wire is (pi) (radius^2) or (pi/4) (diameter^2)
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “When a potential difference of 12 v is applied to a wire 6.8 m long and 0.35 mm in diameter the result is an electric current of 2.1 a? ...” in 📗 Physics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers