âWhere long-term costs are considered, roundabouts eliminate hardware, maintenance and electrical costs associated with traffic signals, which can cost between $5,000 and $10,000 per year.âEngineers also consider how the improvement affects the capacity of the intersection, and how the improvement affects traffic flow.Where long-term costs are considered, roundabouts eliminate hardware, maintenance and electrical costs associated with traffic signals, which can cost between $5,000 and $10,000 per year.
Show transcribed image text An electron is traveling through a region between two metal plates in which there is a constant electric field of magnitude E along the y direction as sketched in the figure below. This region has a total length L, and the electron has an initial speed v0 along the x direction. (Use the following as necessary: m and e for the mass and charge of the electron respectively, E, L, v0.
The force (F) on wire of length L carrying a current I in a magnetic field of strength B is given by the equation: F = BIL. But Q = It and since Q = e for an electron and v = L/t you can show that : Magnetic force on an electron = BIL = B[e/t][vt] = Bev where v is the electron velocity.In a magnetic field the force is always at right angles to the motion of the electron (Fleming's left hand rule) and so the resulting path of the electron is circular (Figure 1). Therefore :and so you can see from these equations that as the electron slows down the radius of its orbit decreases.agnetic force on an electron = BIL = B[e/t][vt] = Bev where v is the electron velocity. In a magnetic field the force is always at right angles to the motion of the electron (Fleming's left hand rule) and so the resulting path of the electron is circular (Figure 1). Therefore :