Parallel Resistors

Remember that resistors in parallel become:




So in this circuit all we have to do is fill in the numbers.



And we have this equation here



To get the current we use the same equation as before



Keep in mind that when doing parallel combinations the voltage is going to be the same across all parallel lines. In our example we will have 10v in each resistor. This means that although we have a single value for the total resistance (1320), the current in each line will be different:



We can check this by adding up our currents



Note I rounded I1, which will explain the difference between 7.4ma and 7.5ma.



Now lets play with Nodal Analysis






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