Kinetic energy of emitted cathode rays is dependent on
Kinetic energy of emitted cathode rays is dependent on
- A
Only voltage
- B
Only work function
- C
Both $(a)$ and $(b)$
- D
It does not depend upon any physical quantity
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A narrow electron beam passes undeviated through an electric field $E = 3 \times {10^4}volt/m$ and an overlapping magnetic field $B = 2 \times {10^{ - 3}}Weber/{m^2}$. If electric field and magnetic field are mutually perpendicular. The speed of the electrons is
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