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Dimensions matter

Dimensions matter. Length of a wire and current Thickness of a wire and current. Resistance in a wire. Which of these wires will oppose the smallest resistance to the electric current flowing through them?. Wrong. Try again. Resistance in a wire.

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Dimensions matter

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  1. Dimensions matter • Length of a wire and current • Thickness of a wire and current

  2. Resistance in a wire Which of these wires will oppose the smallest resistance to the electric current flowing through them?

  3. Wrong. Try again

  4. Resistance in a wire Which of these wires will oppose the smallest resistance to the electric current flowing through them?

  5. Resistance in a wire The longer the wire, the greater the resistance. If we imagine the free electrons in a wire as little men walking through a corridor filled with obstacles (being the obstacles impurities and the atoms in the wire), it is easy to understand that it will be easier for the men to walk a shorter corridor (less resistance) than a long one (more resistance).

  6. Resistance in a wire The thicker the wire, the less the resistance. Using the same analogy of the little men walking through a corridor, it will be easier for them to walk a wider corridor (less resistance) than a narrow one (more resistance).

  7. Resistance in a wire Who’s stepped on my foot? The thicker the wire, the less the resistance. Hey stop pushing Owf! Who made this awful smell?

  8. Resistance in a wire The thicker the wire, the less the resistance. Finally a corridor where nobody pushes Wow! I’ll be able to reach the other side very easily!

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