Given below are two statements : Statement I : The electric force changes the speed of the charged particle and hence changes its kinetic energy; whereas the magnetic force does not change the kinetic energy of the charged particle. Statement II : The electric force accelerates the positively charged particle perpendicular to the direction of electric field. The magnetic force accelerates the moving charged particle

Step-by-step solution

When a charged particle moves in an electric field, the field applies an electric force F → = q E → along the field, so work done by electric field is non-zero resulting in accelerated motion, thus kinetic energy changes. When a particle moves in a uniform magnetic field, the force due to magnetic field on it is perpendicular to its velocity, as force F → = q v → × B → . Since the magnetic field is constant, so force is constant. So, its direction of velocity constantly changes, b