# Difference between revisions of "Lab 1 TF EIM"

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− | Kirchoff's Law | + | =Kirchoff's Law= |

− | Construct the circuit below. | + | ==Construct the circuit below.== |

− | Enter the values of the DC voltage and Resisters that you used. | + | ==Enter the values of the DC voltage and Resisters that you used.== |

{| border="3" cellpadding="20" cellspacing="0" | {| border="3" cellpadding="20" cellspacing="0" | ||

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|} | |} | ||

− | Enter the measured and predicted quantities in the table below | + | ==Enter the measured and predicted quantities in the table below== |

+ | |||

+ | |||

+ | Use Kirchoff's laws to predict the current values and compare them to your measurements by filling in the table below. | ||

{| border="3" cellpadding="20" cellspacing="0" | {| border="3" cellpadding="20" cellspacing="0" | ||

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+ | = Internal resistance= | ||

− | + | Measure the internal resistance of your power source by graphing the potential difference on the x-axis and the current on the y-axis for several values of the resistance <math>R_L</math> shown in the circuit below. Begin with R_L = 1k\Omega and then decrease it by a factor of 5 for each subsequent measurement. You can use a volt meter to measure the current and potential difference. | |

− |

## Revision as of 03:10, 22 October 2010

# Kirchoff's Law

## Construct the circuit below.

## Enter the values of the DC voltage and Resisters that you used.

Variable | Measured Value |

## Enter the measured and predicted quantities in the table below

Use Kirchoff's laws to predict the current values and compare them to your measurements by filling in the table below.

Variable | Measured Value | Predicted Value | % Difference |

# Internal resistance

Measure the internal resistance of your power source by graphing the potential difference on the x-axis and the current on the y-axis for several values of the resistance

shown in the circuit below. Begin with R_L = 1k\Omega and then decrease it by a factor of 5 for each subsequent measurement. You can use a volt meter to measure the current and potential difference.