Potential – Learning Outcomes  Draw and discuss a potential divider.  Demonstrate a potential divider.  Discuss potentiometers and their use in variable.

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Presentation transcript:

Potential – Learning Outcomes  Draw and discuss a potential divider.  Demonstrate a potential divider.  Discuss potentiometers and their use in variable potential dividers.

Potential Divider  e.g. Find the potential difference across each resistor in this circuit.  What is the ratio of their voltages?  How does this ratio compare to the ratio of the resistances?

Potential Divider  This circuit is a potential divider because it splits the total circuit voltage across multiple components.  A larger resistance gets a larger share of the voltage.  The sum of the component voltages is the total circuit voltage.

Variable Potential Divider  If one resistor is a variable resistor, the voltage across the other can be controlled.