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Description
Flashcards by Adam Collinge, updated more than 1 year ago
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Created by Adam Collinge
over 11 years ago
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| Question | Answer |
| 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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