Q20: Force on object due to current in wire
An object with charge `-q` is in motion near a wire that has a current `I` to the right . At the instant shown in the figure above, the object is traveling to the right with speed `v`. Both the wire and the motion of the object are in the plane of the page. Which of the following statements is true about the force on the object due to the current `I` at the instant shown? Below the wire the magnetic field direction is perpendicularly into the paper. Be Careful, this is the negative charge. If you use right hand rule, the moving direction should point to the opposite direction of `v`. The force is directed toward the bottom of the page.