Two long,parallel wires carry currents of different magnitudes.If the amount of current in one of the wires is doubled,what happens to the magnitude of the force that each wire exerts on the other?
A)It is increased by a factor of 8.
B)It is increased by a factor of 4.
C)It is increased by a factor of 3.
D)It is increased by a factor of 2.
E)It is increased by a factor of

Question

Two long,parallel wires carry currents of different magnitudes.If the amount of current in one of the wires is doubled,what happens to the magnitude of the force that each wire exerts on the other?
A)It is increased by a factor of 8. 
B)It is increased by a factor of 4. 
C)It is increased by a factor of 3. 
D)It is increased by a factor of 2. 
E)It is increased by a factor of

Quizplus · Accepted Answer

The force between two parallel wires is directly proportional to the product of the currents and inversely proportional to the distance between them. When the current in one wire is doubled, the force between the two wires is also doubled. Therefore, the magnitude of the force is increased by a factor of 2.

Two Long,parallel Wires Carry Currents of Different Magnitudes