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ENGR2130Chapter4ReadingHomework

True/False
Indicate whether the statement is true or false.
 

 1. 

The number of equations must equal the number of unknowns in a circuit.
 

Completion
Complete each statement.
 

 2. 

When basic circuit elements are interconnected to form a circuit, the resulting interconnection is described in terms of nodes, paths, branches, ________, and meshes.
 

 

 3. 

The number of unknown currents in a circuit equals the number of _______, b, where the current is not known.
 

 

 4. 

The first step is to make a neat layout of the circuit so that no branches cross over and to mark clearly the __________ nodes on the circuit diagram.
 

 

 5. 

A node voltage is defined as the voltage rise from the reference node to a _____________ node.
 

 

 6. 

When a voltage source is the only element between two essential _______, the node-voltage method is simplified.
 

 

 7. 

In general, when you use the node-voltage method to solve circuits that have voltage sources connected directly between essential nodes, the number of unknown node voltages is _______.
 

 

 8. 

When a voltage source is between two essential nodes, we can combine those nodes to form a _____________.
 

 

 9. 

A ___________ current is the current that exists only in the perimeter of a mesh.
 

 

 10. 

If the circuit contains dependent sources, the mesh-current equations must be supplemented by the appropriate _________ equations.
 

 

 11. 

When a branch circuit includes a current source, the mesh-current method requires some ___________ manipulations.
 

 

 12. 

To create a _____________, we mentally remove the current source from the circuit by simply avoiding this branch when writing the mesh-current equations.
 

 

 13. 

The greatest advantage of both the node-voltage and mesh-current methods is that they reduce the number of simultaneous ___________ that must be manipulated.
 

 

 14. 

A ________ transformation allowes a voltage source in a series with a resistor to be replaced by a current source in parallel with the same resistor or vice versa.
 

 

 15. 

Thevenin and Norton __________ are circuit simplification techniques that focus on terminal behavior and thus are extremely valuable aids in analysis.
 

 

 16. 

To find the Thevenin equivalent of a circuit, we first calculate the open-circuit ________ of co016-1.jpg.
 

 

 17. 

The next step is to place a short circuit across the terminals and calculate the resulting short-circuit ___________.
 

 

 18. 

A Norton equivalent circuit consists of an independent current source in parallel with the Norton equivalent _________.
 

 

 19. 

Circuit analysis plays an inportant role in the analysis of systems designed to transfer _______ from a source to a load.
 

 

 20. 

Thus maximum power transfer occurs when the _________ resistance co020-1.jpgequals the Thevenin resistance co020-2.jpg.
 

 

 21. 

A linear system obeys the principle of superposition, which states that whenever a linear system is excited, or driven, by more than one independent source of energy, the total response is the _____ of the individual responses.
 

 

 22. 

When applying superposition to linear circuits containing both independent and dependent sources, you must recognize that the dependant sources are never _________.
 

 

Matching
 
 
a.
planar circuit
e.
mesh
b.
branch
f.
path
c.
essential node
g.
node
d.
loop
h.
essential branch
 

 23. 

A point where two or more circuit elements join.
 

 24. 

A node where three or more circuit elements join.
 

 25. 

A trace of adjoining basic elements with no elements included more than once.
 

 26. 

A path that connects two nodes.
 

 27. 

A path which connects two essential nodes without passing through an essential node.
 

 28. 

A path whos last node is the same as the starting node.
 

 29. 

A loop that does not enclose any other loops.
 

 30. 

A circuit that can be drawn on a plane with no crossing branches.
 



 
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