Norton's Theorem: Current Through Load & Dependent Sources

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In summary, the current through the load can be found by shorting the load terminals and deactivating the independent sources. However, if there are dependent sources, the current may not be zero through the load. This is stated in the reference book. The reason for this is because the dependent source may affect the supply of current to the terminals. It is important to note that the circuit is being solved, which may involve deactivating the independent sources one at a time. In general, the short circuit current (Isc) should not be zero, except in a few special cases. These special cases are not specified.
  • #1
ranju
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for finding the current through the load we short the load terminals and deactivate the independent sources..but if there are dependent sources ..will the current become zero through the load...?? because its stated in my reference book..iof so.. what's the reason..?? being dependent source..how does it affect supplying current to the terminals??
 
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  • #2
you aren't deactivating the sources. You are solving the circuit, which may include deactivating the independent sources one at a time (superposition)
 
  • #3
what is the reason of Isc or shortcircuit current to be zero?
 
  • #4
it shouldn't be zero except in a few special cases.
 
  • #5
n what are those spcl cases?
 
  • #6
ranju said:
n what are those spcl cases?


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  • #7
MrSparkle said:
it shouldn't be zero except in a few special cases.
And what are those special cases?
 

FAQ: Norton's Theorem: Current Through Load & Dependent Sources

What is Norton's Theorem?

Norton's Theorem is a circuit analysis technique used to simplify a complex circuit with multiple sources and resistors into a single equivalent current source and resistor.

What is the difference between Norton's Theorem and Thevenin's Theorem?

The main difference is that Norton's Theorem uses a current source as the equivalent source while Thevenin's Theorem uses a voltage source. Additionally, Norton's Theorem uses a parallel equivalent resistor while Thevenin's Theorem uses a series equivalent resistor.

How do you calculate the Norton current?

The Norton current is equal to the open-circuit voltage divided by the equivalent resistance in the circuit. The open-circuit voltage can be found by removing the load resistor and calculating the voltage across the load terminals.

What are dependent sources and how do they affect Norton's Theorem?

Dependent sources are sources whose values are determined by the value of another element in the circuit. In Norton's Theorem, dependent sources can be included in the equivalent current source if they are connected in parallel with the load resistor.

What are the limitations of Norton's Theorem?

Norton's Theorem is only applicable to linear circuits, meaning that the current through the load must be directly proportional to the voltage across the load. It also assumes that the circuit is in steady-state and does not take into account the effects of capacitance or inductance.

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