Circuits and Schematic Diagrams Chapter 35. Circuits  ~a set of components that give current a path to follow  You need:  Voltage source  resistor.

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Presentation transcript:

Circuits and Schematic Diagrams Chapter 35

Circuits  ~a set of components that give current a path to follow  You need:  Voltage source  resistor  wire Symbols Switch open closed not necessary for a circuit to have

A complete circuit  ~gives current a complete path (from + to - through a resistor).  also called closed  Resistor receives power

Complete Circuits

An incomplete circuit  ~does not give current a complete path (from + to - through a resistor).  also called open  either a wiring mistake or a switch is open to turn it off.  Resistor does not receive power

Incomplete Circuits

A short circuit  ~gives current a complete path (from + to – but not through a resistor).  electricity will always take the path of least resistance. (avoid the resistor if it can)  Resistor does not receive power

Short Circuits

Shorts are dangerous  with no resistor, there is nothing to slow the current down.  The only resistance is from the wire, which is low.  This pulls a lot of amperage across and causes it to heat up.  This causes sparks and fires.

homework  Pg 714  1-15