Question

Why is no work done by magnetic forces in a uniform B and E field (perpendicular to one another)?

Answer 1

Say BB points in the xx direction, and EE points in the zz direction. Assuming a charged particle begins at rest at the origin, its motion will be a cycloid that progresses indefinitely in the yy direction.

Assuming that the magnetic force never does work, how do you explain the change in electric potential energy as the particle oscillates in the zzdirection? How do you account for the particles motion in the yy direction when there is no potential defined in that direction?

My only guess is that (and I have not yet studied this) the BB field is equivalent to the EE field when relative motion is considered, so perhaps there is a reference frame (could be inertial or non-inertial) where this situation is can be "transformed" to one in which there is only an EE field (may or may not be constant) and no BB field.

Answer 2

$<marquee>{Hello Friend}$


The answer of u r question is..✌️✌️

✨Why is no work done by magnetic forces in a uniform B and E field.✨

Ans:✍️✍️✍️✍️✍️✍️✍️✍️

✔️✔️The work is not done by magnetic forces in a uniform B and E field because they are opposite to each other and they are not perpendicular.✔️✔️

$\huge{Thank you}$