Consider two long parallel wires with the same length carrying currents of diffe
ID: 1385126 • Letter: C
Question
Consider two long parallel wires with the same length carrying currents of different magnitudes. The magnitude of the force that one wire exerts on the other is F0.
A) If the current in both wires is doubled, what happens to the magnitude of the magnetic force (in terms of F0) that each wire exerts on the other?
B) If the current in one wire is doubled and the current in the other wire is halved, what happens to the magnitude of the magnetic force (in terms of F0) that each wire exerts on the other?
Explanation / Answer
Force between current carrying wires is
F = [ mu_o I1 I2 / 2 pi d ] L
a)
If I1 and I2 is doubled
Force between the wires increases to fourtimes of the original force . that is 4 F_o
b)
If the current in the one is doubled, the Force between the wires increases to twotimes of the original force . that is 2 F_o