MCQ
A cathode emits $1.8\times 10^{14}$ electrons per second, when heated. When 400V 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
- A$2.7\ \mu A$
- ✓$29\ \mu A$
- C$72\ \mu A$
- D$29\ \mu A$