3
Question
A proton is falling freely under gravity enters a region having uniform horizontal magnetic field pointing towards North. The particle will be deflected towards -
A proton is falling freely under gravity enters a region having uniform horizontal magnetic field pointing towards North. The particle will be deflected towards -
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Solution
The correct option is A East
As per the question, proton is falling under gravity and the direction of magnetic field →B is towards North.
From the given information we can take the direction of →v and →B as ^v=−^j and ^B=−^k respectively.
Now, the direction of magnetic force on a charged particle is,
^Fm=^v×^B=−^j×−^k=^i
As the charge on the proton is positive, so the direction of →F will be towards East.
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Hence, it will deflect towards East.
As per the question, proton is falling under gravity and the direction of magnetic field →B is towards North.
From the given information we can take the direction of →v and →B as ^v=−^j and ^B=−^k respectively.
Now, the direction of magnetic force on a charged particle is,
^Fm=^v×^B=−^j×−^k=^i
As the charge on the proton is positive, so the direction of →F will be towards East.
<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, it will deflect towards East.
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