This section contains multiple choice questions. Each question has 4 choices (a), (b), (c) and (d ) out of which ONE OR MORE may be correct.

A proton moving with a constant velocity passes through a region of space without any change in its velocity. If E and B represent the electric and magnetic fields respectively, Identify which of the following options can be true for the space.

Question

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Answer 1

A proton moving through a space contain electric and magnetic field will experience a force
$F = q (E + v \times B)$
If the proton passes through the space without changing its velocity then two cases can be possible:
i) either $E = 0$ and $B = 0$ . (Trivial case)
ii) or, $E \neq = 0$ and $B \neq = 0$ (motion of the proton (v) is perpendicular to the B)

Answer 2

A proton moving through a space contain electric and magnetic field will experience a force

F = q (E + v \times B)

If the proton passes through the space without changing its velocity then two cases can be possible:
i) either

E = 0

and

B = 0

. (Trivial case)
ii) or,

E \neq = 0

and

B \neq = 0

(motion of the proton (v) is perpendicular to the B)