A 15.0 m long string of Christmas lights has two parallel wires twisted around each other. One carries 1.47 A of current toward the tree and the other carries the same current away from the tree. If the magnetic force between the wires is 0.0245 N, how far apart are they?

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.