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Electron, Photon, Photo-electric Effect and X-Rays — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsElectron, Photon, Photo-electric Effect and X-Rays1 Mark
MCQ
Cathode rays and canal rays produced in a certain discharge tube are deflected in the same direction if
  • ✓
    A magnetic field is applied normally
  • B
    An electric field is applied normally
  • C
    An electric field is applied tangentially
  • D
    A magnetic field is applied tangentially
✓

Answer

Correct option: A.
A magnetic field is applied normally
In discharge tube cathode rays (a beam of negative particles) and canal rays (positive rays)moves opposite to each other.
They will experience a magnetic force in the same direction, if a normal magnetic field is switched on

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