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Criado por Adam Collinge
mais de 10 anos atrás
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Questão | Responda |
What is the equation for Potential difference? | P.D=Current x Resistance V=I x R |
What does V-I graphs show? | How the current varies as you change the potential difference |
What do V-I graphs have different slopes? | Because the current through a resistor is directly proportional to the P.D |
What happens when the temperature of a component increases in a V-I graph? | The graph has an 's' shaped curve |
How many directions will current flow through a diode? | Only one |
When does resistance increases? | With temperature |
Why does resistance increases with temperature? | The heat transferred from electrical energy causes the ions in the conductor to vibrate more. Ions moving about more it's more difficult for the charge-carrying electrons to get through the resistor- the current can't flow as easily and so is increased |
What is the equation for resistance? | R=V/I |
On a V-I graph, what does a curving line mean? | Resistance is changing |
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