A proton, that is accelerated from rest through a potential of 20.0 k enters the velocity filter, consisting of a parallel-plate capaçitor and a magnetic field, shown below. The E-field between the parallel capacitor plates is 3.7.105 N/C. What B-field is required so that the protons are not deflected? (Ignorė relativistic effects for high velocities.)

An object with a charge of +0.3 C moves through a magnetic field of strength 40 T with a velocity of 200m/s as shown. How much force does the magnetic field apply on the particle?

A 2.00µC charge, centered at the origin of a reference frame, feels a 5.00N force on it from a 10.0µC charge located nearby, at an angle of 135° with respect to the X axis.   What is the field strength and direction in polar form, of the E field caused by the 10.0µC charge at the location of the 2.00µC charge? ( labeled drawing of setup) How far away from the 2.00µC is the 10.0µC charge?

(unrealistic) E/M Forces 6. A particle of charge q = 0.25C and mass m = 1.0kg is moving with a velocity of v = (2,0,0)m/s. The (8,8,8)N/C and a magnetic field of B = (0,0, –2)T. charged particle finds itself in an electric field of E What will be the initial vector acceleration of the particle?