JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES

1 Easy

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Analyzing +4 | -1

A proton moving with a constant velocity passes through a region of space without any change in its velocity. If

\vec{E}

and

\vec{B}

represent the electric and magnetic fields respectively, then the region of space may have:

(A)

E=0, B=0

(B)

E=0, B \neq 0

(C)

E \neq 0, B=0

(D)

E \neq 0, B \neq 0

Choose the most appropriate answer from the options given below:

View answer and explanation

Correct option: C

(A), (B) and (D) only

Option C is correct. A proton can pass through a region with no change in velocity if E=0, B=0; E=0, B� 0 (if velocity is parallel to B); or E� 0, B� 0 (if electric and magnetic forces cancel each other).

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