Question

calculate the length of nichrome wire needed to make the coin if the cross-sectional area is 1.0 * 10 raise to power - 7 metre square and the resistivity of nichrome is 1.0 * 10 raise to power - 6 ohms metre.if the diameter of the second wire,half of the diameter of the first is to be use,what is the length of the second wire needed for the same work​

Answer 1

Answer:

calculate power 7 me sq