RAJASTHAN ­ PET Rajasthan PET Solved Paper-2010

  • question_answer
    A proton (or charged particle) moving with velocity v is acted upon by electric field E and magnetic field B. The proton will move undeflected if,

    A)  E is perpendicular to B

    B)  E is parallel to v and perpendicular to B

    C)  E, B and v are mutually perpendicular and v=\[\frac{E}{B}\]

    D)  E and B both are parallel to v

    Correct Answer: B

    Solution :

     In this case\[|{{\overrightarrow{F}}_{e}}|=|{{\overrightarrow{F}}_{m}}|\]both forces are opposite to each other.


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