Question

In hydrogen discharge tube, it is observed that through a given cross-section \( 3.31 \times 10^{15} \) electrons are moving from right to left and \( 3.12 \times 10^{8} \) protons are moving from left to right. The current in the discharge tube and its direction will be?

• A. 2 mA towards left
• B. 2 mA towards right
• C. 1 mA towards right
• D. 2 mA towards left

Hint:

Current is determined by the total charge flow, and can be calculated based on the number of electrons and protons moving in opposite directions.

Answer 1

The Correct Option is C

The current is determined by the net charge flow through the discharge tube. Since electrons move in one direction and protons in the opposite direction, the net current is determined by the difference in the amounts of charges.