An electron is emitted with negligible speed from the negative plate of a parallel plate capacitor charged to a potential difference
V. The separation between the plates is
d and a magnetic field
B exists in the space as shown in figure. Show that the electron will fail to strike the upper plate if
d>(2meVeB20)12.
![696605_d71f941e3f74449cb6eff23bd05381bc.png](https://search-static.byjusweb.com/question-images/toppr_ext/questions/696605_d71f941e3f74449cb6eff23bd05381bc.png)