物理ge概念問題~

1) 當 電流增加...電壓係唔係唔變?
No. When the current increases, the amount of charges (the number of coulombs) flowing through a component (e.g. a resistor) also increase. Since voltage indicates the energy released by the flowing charges, an increase of charges will increase the energy released, hence the voltage across the component.
2) 當電阻增加..令電流減少..咁電壓係唔係都係唔變?
No. This is just the reverse of the above. A decrease of current means a reduction in the flowing charges. The number of coulombs passing through a component is reduced. The total energy released will decrease accodingly. Thus the voltage across the component will decrease.

如何改變電阻=如何改變電流,
電流or電阻的增加or減少,吾會影響電壓.