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KVPY2020PhysicsMagnetic Effects of Current

A collimated beam of charged and uncharged particles is directed towards a hole marked P on a screen as shown below. If the electric and magnetic fields as indicated below are turned on

Options

  1. Aonly particles with speed E / B will go through the hole P .
  2. Bonly charged particles with speed E / B and neutral particles will go through P .
  3. Conly neutral particles will go through P .
  4. Donly positively charged particles with speed E / B and neutral particles will go through P .

Correct answer

C. only neutral particles will go through P .

Step-by-step solution

For charged particles net force is in downward direction, so they won't be able to go through the hole P . And uncharged particle don't deviate so they will be able to go through hole P .

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