1. Tardigrade
  2. Question
  3. Physics
  4. In a Neon discharge tube 2.9 × 1018 Ne + ions move to the right each second, while 1.2 × 1018 electrons move to the left per second. electron charge is 1.6 × 10-19 C. The current in the discharge tube is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. In a Neon discharge tube $2.9 \times 10^{18} Ne ^{+}$ ions move to the right each second, while $1.2 \times 10^{18}$ electrons move to the left per second. electron charge is $1.6 \times 10^{-19} C$. The current in the discharge tube is

AIIMSAIIMS 2000Dual Nature of Radiation and Matter

Solution:

Charge on ions = 2.9 × 1018 × 1.6 × 10-19 C
Charge on electrons = 1.2 × 1018 × 1.6 × 10-19 C
Total charge = 4.1 × 1.6 × 10-1 C
= 6.56 × 10-1 C = 0.66 C.
Current $=\frac{Charge}{Time}=\frac{0.66\left(C\right)}{1\left(s\right)}=0.66$ A.
The direction of current in a circuit is, by convention, taken along the direction in which positive charges flow. Hence the current in the discharge tube flows towards right.