Magnetism



  • Q28 ans a)increase b)decrease
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  • @nishant-thakre Imagine you are looking towards the atom from below and field is perpendicular to plane of electron and vertically upwards(same direction as you are looking) now when electron is moving clockwise use left hand rule (motion if charge will be opposite to that of electron) and you will find that force due to magnetic field is towards inside
    Now by Newton's second law
    Mv^2/r=coulumb force +magnetic force
    As coulumb force not changing (charge and radius same) thus v will increase to balance the magnetic force and thus angular frequency increases
    Similarly do for b part


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