# Resistance and V=IxR

Flashcards by Adam Collinge, updated more than 1 year ago
 Created by Adam Collinge almost 7 years ago
134
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Pg87

## Resource summary

 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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