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# Voltage Divider PowerPoint Presentation, PPT - DocSlides

sherrill-nordquist | 2017-04-13 | General
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Series Circuits. Take a series circuit with two resistors. Since each is the same resistance, they use up the same amount of voltage, . 6V. Therefore the voltage at point A is . 6V. Series Circuit. We can rearrange the circuit as shown on the right. ID: 536977

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Slide1

Voltage Divider

Slide2Series Circuits

Take a series circuit with two resistorsSince each is the same resistance, they use up the same amount of voltage, 6VTherefore the voltage at point A is 6V

Slide3Series Circuit

We can rearrange the circuit as shown on the right

Slide4Series Circuit

And then simplify it once more

Slide5Series Circuit

=

Slide6Voltage Divider

It doesn’t matter the amount of resistance, if they are equal they use the same voltageThe voltage at A in this case is still 6V

Slide7Voltage Divider

By adjusting the ratio of the resistors, we change how much voltage each one “uses up”The resistance at A is significantly higher now since the second resistor will need much more voltage

Slide8Voltage Divider

The resistance at A will now be significantly lower since the first resistor will use up most of the voltageBy altering the ratio of resistors we can alter the voltage at A

Slide9Voltage Divider

Suppose we replace the top resistor with a sensor that can change resistanceIn this case a light sensor, photoresistor, that operates from 1k – 10k based on lightBy measuring the voltage at A we can determine the amount of light in the room

Slide10LAB

Complete the “Sensors in a Circuit” Lab

In Unit 10

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