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Magnetic Field — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsMagnetic Field1 Mark
Question
A beam consisting of protons and electrons moving at the same speed goes through a thin region in which there is a magnetic field perpendicular to the beam. The protons and the electrons:
  1. Will go undeviated.
  2. Will be deviated by the same angle and will not separate.
  3. Will be deviated by different angles and hence separate.
  4. Will be deviated by the same angle but will separate.
✓

Answer

  1. Will be deviated by different angles and hence separate.

Explanation:

$\vec{\text{F}}=\text{q}(\text{V}\times\text{B})$

Charge proton is poritive = e

Fp = evB

Charge of electron is negative = -e

Fe = -evB

They will be deviated by different angles and Hence separate.

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