A copper wire of length #L1 = 6m# and cross sectional area of #A1 = 4mm^2# has the same resistance as another copper wire of length #L2 = 18mm.# What is the ratio between the masses of the two wires, m2/m1?
1 Answer
Jun 8, 2017
The ratio is
Explanation:
The mass and the volume are related by
The density is
The ratio of the masses is the same as the ratio of the volumes
The volume is
If the wires have the same resistance,
Therefore,