If a charged particle projected in a gravity-free room deflects,
(a) there must be an electric field
(b) there must be a magnetic field
(c) both fields cannot be zero
(d) both fields can be non-zero

Question

If a charged particle projected in a gravity-free room deflects- thenthere must be a magnetic fieldthere must be an electric fieldboth fields cannot be zeronone of these

Toppr Admin · Accepted Answer

Since there must be some external force which will cause the deflection of charge particle and it can be both magnetic force or electric force.
Therefore, simultaneously both the fields cannot be zero therefore, option(C).
Option(A) and (B) are saying that there should be electric field compulsory or magnetic field compulsory for deflection which is not true therefore, only option(C).

If a charged particle projected in a gravity-free room deflects, thenthere must be a magnetic fieldthere must be an electric fieldboth fields cannot be zeronone of these

If a charged particle projected in a gravity-free room deflects, then
there must be a magnetic field
there must be an electric field
both fields cannot be zero
none of these