426. Problem 34.7 (RHK) An electron in a uniform magnetic field has a velocity . It experiences a force . If , we have to calculate the magnetic field. 
Solution: Click For PDF Version The force on an electron, charge e, velocity , in magnetic field is given by the equation Data of the problem are , As , we will write the magnetic field as We thus have the vector equation We will use the properties of the cross product and and rewrite equation as and It may be noted that the equation is consistent with the equation, as it also gives Therefore, the magnetic field is
