Current Source
It is the dual of the voltage source.
For a fixed dc voltage source, voltage across it’s terminal is constant but current may vary.
For a fixed dc current source, current through it, is constant but voltage may vary.
&nb...
This is default featured post 1 title
Go to Blogger edit html and find these sentences.Now replace these sentences with your own descriptions.
Wednesday, June 29, 2011
Tuesday, June 28, 2011
Method of (Circuit) Analysis
Methods for two or more souces
Branch-current Analysis
Mesh analysis and
Nodal analysis
All the methods will be described for linear bilateral networks only
Liner indicates that the characteristics of the of the network elements are independent of voltage across or current through them.
e. g. Resistor
A 10kΩ resistor always shows 10kΩ whether the voltage across it is 10V or 100V
So resistor is a linear element but diode is not. Bilateral: it refers to the fact that there is no change in the behavior or characteristics of an element if the current through or voltage across the element is reversed
...
Measurement of flow by using flow meter
Introduction: a flow meter or thermal conductivity meter is that kind of meter by which we can measure the quantity of water , liquid , gas , air going through a tube. An air flow meter measure the flow rate of air in the pipe.
Description:
A flow meter or a thermal conductivity meter may be constructed using the following circuit diagram
Operation principle: From the figure we can see that two thermistors RT1 and RT2 are used adjacent to each other. For the flow measurement, one thermistor is sealed in a small cavity copper cylinder and other installed in a small copper pipe. The bridge can be balanced so that the output voltage is zero....
Monday, June 27, 2011
Superposition Theorem
SUPERPOSITION THEOREM
The superposition theorem is unquestionably one of the most powerful in the field . it has such widespread application that people often apply it without recognizing that their maneuvers are valid only because of the theorem .Use of Superposition Theorem:•Analyze networks that have two or more sources that are not in series or parallel . •Reveal the effect of each source on a particular quantity of interest. •For source of different types apply a separate analysis for each type , with the total result simply the algebraic sum of the results. THE STATE OF SUPERPOSITION THEOREM The current through, or voltage across ,any element of a network is equal to the algebraic sum of the currents or voltage produced independent by each source . How ...
