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Worked example of a parallel circuit. This is a parallel circuit in which you have to

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calculate the following questions. The total equivalent resistance of the circuit.

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The total current flowing through the circuit. The current flowing through each resistor.

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The voltage or potential difference across each resistor.

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The power supplied by the cell and the power dissipated in the circuit.

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The data you are given is the value of the resistors in parallel and the voltage of the cell.

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Firstly, the total equivalent resistance of the circuit.

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It is really important you calculate it correctly, because you will use this value in the rest of the exercise.

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I in this case, you have three resistors in parallel of 30, 90, and 180 ohms.

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we obtain the total resistance of the circuit by grouping all the resistors in parallel together

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remember to use calculator and that the result 0 0 5 it is the inverse of the equivalent resistase

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we're looking for to calculate the total equivalent current we need to apply ohm's law to the

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equivalent circuit intensity is equal to the voltage of the cell divided by the equivalent

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resistance. The current flowing through each resistor. This is a parallel circuit so all of

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the resistors have a voltage of 3V which is the cell voltage. We calculate each intensity with

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the Ohm's law. We confirm that the total current is the sum of the three currents flowing through

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each branch. As we said before the voltage or potential difference across all resistors is

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the same and equal to 3V because resistors are in parallel. The dissipated power is the sum of

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the power consumed by each resistor. You can calculate each power with the product of voltage

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and intensity. We confirm that the delivered power and the power dissipated in the circuit are equal.