Question

If you know the direction of flow of current, can you say all the particles of the current are going only in that direction at any point of time?

• A. Yes, they always move in the direction of the current.
• B. No, they need not at every point of time, but the net movement is in the direction of the current.
• C. Yes, they always move in a direction different from the direction of the current.
• D. Yes, they move in a direction opposite to the direction of the current.

Answer 1

The correct option is B

No, they need not at every point of time, but the net movement is in the direction of the current.

When we say that there is a current of balls, we actually mean that the net movement of the balls over a period of time is in the direction of the current. The balls, individually, could be moving in any random direction at any given instance.