Question

Consider the charges shown below which are traveling with velocity v in a magnetic field B. Each charge will experience a force F caused by the magnetic field. In the diagrams below draw the direction of the force on each charge caused by the magnetic field. If the force is given, draw the direction of the velocity necessary to give the force as shown. Use the symbols and to represent vectors that point out of and into the plane of the page respectively.

Answer 1

The expression for force is written as, From the fig (a) it is clear that the velocity acting along y direction and magnetic field acts along the x direction. F-(-Uxi) Therefore, the force caused by the magnetic field is out of the page. From the fig (b) it is clear that the velocity acting along y direction and magnetic field acts along the in to the plane of the page F-(a)jx-R) Therefore, the force caused by the magnetic field is towards left. From the fig (c) it is clear that the magnetic field acting along y direction and velocity acts along the in to the plane of the page. (9%i) Therefore, the force caused by the magnetic field is towards right. From the fig (d) it is clear that the force acting along y direction and magnetic field act:s along the in to the plane of the page If the velocity direction is towards the right of the horizontal then the force is vector will be equal toj Hence, the velocity will be along the right side