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Satish Pradhan dnayansadhana college, Thane

Satish Pradhan dnayansadhana college, Thane. ( Academic Year 2017 – 2018) SEMESTER SECOND Subject-Physics Paper-II Class- F. Y. B. Sc. TOPIC : NORTAN’S THEOREM. Presented By Ms. Ankita P. Angre Department of Physics. NORTON’S THEOREM:.

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Satish Pradhan dnayansadhana college, Thane

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  1. SatishPradhandnayansadhana college, Thane ( Academic Year 2017 – 2018) SEMESTER SECOND Subject-Physics Paper-II Class- F. Y. B. Sc TOPIC : NORTAN’S THEOREM Presented By Ms. Ankita P. Angre Department of Physics

  2. NORTON’S THEOREM: Assume that the network enclosed below is composed of independent sources and resistors. Network Norton’s Theorem states that this network can be replaced by a current source shunted by a resistance R.

  3. NORTON’S THEOREM: Assume that the network enclosed below is composed of independent sources and resistors. Network Norton’s Theorem states that this network can be replaced by a current source shunted by a resistance R.

  4. NORTON’S THEOREM: We recall the following from source transformations. In view of the above, if we have the Thevenin equivalent circuit of a network, we can obtain the Norton equivalent by using source transformation. However, this is not how we normally go about finding the Norton equivalent circuit.

  5. NORTON’S THEOREM: Find the Norton equivalent circuit to the left of terminals A-B for the network shown below. Connect the Norton equivalent circuit to the load and find the current in the 50  resistor. Circuit diagram

  6. NORTON’S THEOREM: Circuit for find INORTON. It can be shown by standard circuit analysis that

  7. NORTON’S THEOREM: It can also be shown that by deactivating the sources, We find the resistance looking into terminals A-B is RN and RTH will always be the same value for a given circuit. The Norton equivalent circuit tied to the load is shown below. Final circuit

  8. NORTON’S THEOREM: This example illustrates how one might use Norton’s Theorem in electronics. the following circuit comes close to representing the model of a transistor. For the circuit shown below, find the Norton equivalent circuit to the left of terminals A-B. Circuit .

  9. NORTON’S THEOREM: Example 10.7. continued We first find; We first find VOS:

  10. NORTON’S THEOREM: Example 10.7. continued Figure 10.34: Circuit for find ISS, Example 10.7. We note that ISS = - 25IS.Thus,

  11. NORTON’S THEOREM: Circuit for find VOS, From the mesh on the left we have; From which,

  12. NORTON’S THEOREM: We saw earlier that, Therefore; The Norton equivalent circuit is shown below. Norton Circuit for Example 10.7

  13. Extension of Example Using source transformations we know that the Thevenin equivalent circuit is as follows: .

  14. Questions?

  15. THANK YOU

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