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Current in a circuit

0 votes

asked Aug 2, 2015 in ELECTRICAL ENGINEERING by anonymous

1 Answer

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Step 1:

Super Position Theorem :

Take one current source at a time and replace all other current sources with open circuit and voltage sources with short or internal resistance.

Consider 2 A current source.

Use the current dividing rule to find the current through the 120 resistor.

image

Step 2:

Take another current source at a time and replace all other current sources with open circuit and voltage sources with short or internal resistance.

Consider I1 A current source.

Use the current dividing rule to find the current through the 120 resistor.

Step 3:

Take voltage source at a time and replace all other current sources with open circuit.

Consider 75 V current source.

Find the equivalent resistance.

Circuit current is .

image

Step 4:

The cuurent flowing through the 120 resistor with the effect of 3 active sources.

image

From the step (2) results image.

image

Therefore the amount of current provided by the current source is image.

The direction of the current moves opposite to the 120 resistor.

Solution :

Current source is image.

Direction of the current is moving opposite to the 120 resistor.

answered Aug 3, 2015 by justmaths Rookie

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