Respuesta :
If the resistance of the resistor in the figure is slowly increased, the direction of the current induced in the small circular loop inside the larger loop is counter clockwise.
What is the direction of the current?
- Conventionally, a positive charge would go in the same direction as an electric current. As a result, the battery's positive terminal receives less current in the external circuit than its negative counterpart.
- Actually, electrons would go in the reverse direction across the cables. This convention may seem a little strange and out of date when one realizes that the real charge carriers in wires are negatively charged electrons.
- Nevertheless, it is the accepted practice across the globe, and a physics student can quickly get acclimated to it.
- The average distance covered by a charge carrier in a given amount of time is referred to as drift speed.
- The distance to time ratio determines an electron's drift speed, which is the same as any other object's speed.
- A typical electron's travel across a wire could be compared to a chaotic, zigzag path that is characterized by collisions with stationary atoms.
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