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

Q. In a Neon discharge tube ions move to the right each second, while electrons move to the left per second. electron charge is . The current in the discharge tube is

 8694  213 AIIMSAIIMS 2000Dual Nature of Radiation and Matter Report Error

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 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.