A cubical region of space is filled with some uniform electric and magnetic fields. An electron enters the cube across one of its faces with velocity V¯ and a positron enters via opposite face with velocity −V¯ simultaneously. At this instant, $$a)$$ the electric forces on both the particles cause identical $$accelerationsb)$$ the magnetic forces on both the particles cause equal accelerations.$$c)$$ both particles gain or loose kinetic energy at the same rate.$$d)$$ the motion of the centre of mass (CM) is determined by B¯ alone.Which of the statement is wrong:

Question

A  cubical region of space is filled with some uniform electric and magnetic  fields. An electron enters the cube across one of its faces with velocity V¯      and a  positron enters via opposite face with velocity −V¯      simultaneously. At this instant,  $$a)$$  the electric forces on both the particles cause identical $$accelerationsb)$$  the magnetic forces on both the particles cause equal accelerations.$$c)$$  both particles gain or loose kinetic energy at the same rate.$$d)$$  the motion of the centre of mass (CM)      is determined  by B¯      alone.Which  of the statement is wrong:

Infinity Learn · Accepted Answer

Options  $$2$$, $$3$$, $$4$$ are correct.  Due  to electric field, they experience accelerations of equal magnitude  but in opposite directions.Only  electric field can change their kinetic energy Fmag      act on them  in the same direction

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