An electron moves with a velocity `vec(v)` in are electric field `vec(E)` if the angle between `vec(V)` and `Vec(E)` is neither `0` nor `pi` ,then path followed by the electron is

The electric flux is negative, if the angle between vec(dA) and vec (E)

An electron is launched with velocity vec v in a uniform magnetic field vec B. The angle theta between vec v and vec B lies between 0 and pi /2 . Its velocity vector vec v returns to its initial value in a time interval of

An electron is launched with velocity vec v in a uniform magnetic field vec B. The angle theta between vec v and vec B lies between 0 and pi /2 . Its velocity vector vec v returns to its initial value in a time interval of

An electron is projected wit velocity vec(v) = v_(0) hat(x) in an electric field vec(E) = E_(0) hat(y) . Trace the path followed by the electron :-

The figure shows three situations when an electron moves with velocity vec(v) travels through a uniform magnetic field vec(B) . In each case, what is the direction of magnetic force on the electron