Which is not true with respect to the cathode rays
A stream of electrons
Charged particles
Move with speed same as that of light
Can be deflected by magnetic fields
Which of the following will have the least value of $\frac{q}{m}$
Cathode rays are similar to visible light rays in that
In the Millikan's experiment, the distance between two horizontal plates is $2.5 \,\,cm$ and the potential difference applied is $250\,\, V$ . The electric field between the plates will be ....... $V/m$
A cathode emits $1.8 \times {10^{14}}$ electrons per second, when heated. When $ 400\;V$ is applied to anode all the emitted electrons reach the anode. The charge on electron is $1.6 \times {10^{ - 19}}\;C$. The maximum anode current is ............ $\mu A$
Order of q/m ratio of proton, $\alpha $ -particle and electron is