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AS Level     >Resistors<     Bridge Circuit    

Resistors


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  AS Level    Resistors  0 of 3    Question 1369    Resistors 
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Nick Reeder's Resistor Challenge

Circuit Symbols

Circuit Diagram Symbols for Resistors

A Simple Circuit

In this simple circuit, the resistor limits the current to a small steady safe level. The switch also has resistance; either zero (on) or infinity (off).

A circuit with one resistor and a switch

What Resistors Do

Pull up and pull down resistors and switches

Resistor Structure

Resistor Structure

A Short Circuit

Without a current limiting resistor, the current is very large and possibly dangerous. There is a fire risk. This is called a short circuit.

A short circuit, large current, fire risk

Don't Try This at Home

 

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