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Question-1. State Thevenin's theorem?

Answer-1: Any linear two terminal networks consisting of resistances and sources of emf can be replaced by a single source of emf V_{th} in serial with a single resistance R_{th}

V_{th}= Open circuit voltage at the two specified terminals

R_{th} =Resistance looking back into the network with all the source of emf shorted and replaced by their internal resistance.

Question-2. How do you Thevinise the given network?

Answer-2:

A) Calculate the open circuit voltage V_{th} (R_{L} is disconnected)

B) Replace voltage source by a short circuit in series with the internal resistance of the voltage source or replace each current source by an open circuit in parallel with the internal resistance of the current source.

C) Calculate R_{th}

V_{th} is in series with R_{th} and R_{L}

Question-3. What is a Voltage source?

Answer-3: The source which has very low internal resistance.

Question-4. What is current source?

Answer-4: The source which has very high internal resistance.

Question-5. What is a circuit element?

Answer-5: A Circuit component with two terminals by which it can be connected to other electric components is called circuit element. Examples: Resistor, Capacitor and Inductor.

Question-6. What are active elements?

Answer-6: Circuit elements which supply energy to a network are called active elements. Examples: Batteries, Generators, Transistors etc.

Question-7. What are passive elements?

Answer-7: Circuit elements which either absorb or store energy are called passive elements. Examples: Resistors, Inductors and Capacitors.

Question-8. What is a node (Junction)?

Answer-8: It is point is a network where two or more elements (Currents) meet.

Question-9. What is mesh or loop?

Answer-9: A closed path for the current in a given network is called the mesh or loop.

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