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Electron, Photon, Photoelectric Effect and X-Rays — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsElectron, Photon, Photoelectric Effect and X-Rays1 Mark
Question

A narrow electron beam passes undeviated through an electric field E = 3  and an overlapping magnetic field B = 2 . If electric field and magnetic field are mutually perpendicular. The speed of the electrons is

(a) 60 m/s

(b) 10.3  

(c) 1.5  

(d) 0.67  
✓

Answer

(c) 1.5  

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