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Magnetic Field — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsMagnetic Field1 Mark
MCQ
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:
  • A
    Will go undeviated.
  • B
    Will be deviated by the same angle and will not separate.
  • ✓
    Will be deviated by different angles and hence separate.
  • D
    Will be deviated by the same angle but will separate.
✓

Answer

Correct option: C.
Will be deviated by different angles and hence separate.
$\vec{\text{F}}=\text{q}(\text{V}\times\text{B})$
Charge proton is poritive $=\mathrm{e}$
$F_p=e v B$
Charge of electron is negative $=-e$
$F_e=-e v B$
They will be deviated by different angles and Hence separate.

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