An Electron Beam Travels Counterclockwise in a Circle of Radius

question 56

Multiple Choice

An electron beam travels counterclockwise in a circle of radius R in the magnetic field produced by the Helmholtz coils as shown. If you increase the current in the Helmholtz coils, the electron beam will

• A) increase its radius.
• B) decrease its radius.
• C) maintain the same radius.
• D) reverse and travel clockwise with the same radius.
• E) reverse and travel clockwise with a larger radius.