MCQ
An electron moves straight inside a charged parallel plate capacitor of uniform charge density. The space between the plates is filled with uniform magnetic field of intensity $B ,$ as shown in the figure, Neglecting effect of gravity, the time of straight line motion of the electron in the capacitor is
- A$\frac{\sigma }{{{\varepsilon _0}lB}}$
- B$\frac{{{\varepsilon _0}B}}{\sigma }$
- C$\;\frac{\sigma }{{{\varepsilon _0}B}}$
- ✓$\;\frac{{{\varepsilon _0}lB}}{\sigma }$
