RMS - Root Mean Square, the measurement of the magnitude of a changing value or quantity.
Peak - maximum or highest amplitude level.
Peak to Peak - the maximum positive and maximum negative values of an AC waveform.
Frequency - the current that keeps on changing directions.
mike's page
14 June, 2010
08 June, 2010
31 May, 2010
Flux Lines
Rules of Flux Lines
1. they always form complete closed loops
2. they never cross one another
3. they have a definite direction
4. they try to contract as if they were stretched elastic threads
5. they repel each one another when lying side by side and have the same direction.
1. they always form complete closed loops
2. they never cross one another
3. they have a definite direction
4. they try to contract as if they were stretched elastic threads
5. they repel each one another when lying side by side and have the same direction.
24 May, 2010
Exam Coverage
Fraction-Decimal-Percent
Unit Conversion
-Engineering
-Exponential
-SI units
Triangles
Force & Work
Vectors
Ohm's Law
Atomic Theory
Unit Cost
Conductors & Insulator
Resistivity
Resistors
-types
-colors
-E12 range
Series, Parallel & Network
Unit Conversion
-Engineering
-Exponential
-SI units
Triangles
Force & Work
Vectors
Ohm's Law
Atomic Theory
Unit Cost
Conductors & Insulator
Resistivity
Resistors
-types
-colors
-E12 range
Series, Parallel & Network
23 May, 2010
17 May, 2010
Resistor Network
first thing to do is to solve the R3 R4 and R5 by adding them and then redraw it and you will get the value and which is parallel to R2, and then solve those 2 resistors in parallel, after you the value of that redraw it again and you'll get a series circuit and add them all that your total resistance, you can now start solving for the total current and start getting the voltage drop of each resistors in your last series circuit drawing. after you get the total current, go to your second drawing and solve the current drop of 2 resistors in parallel circuit because the current the in parallel will split.
10 May, 2010
series and parallel circiut
03 May, 2010
How To Read A Resistor
How To Read A Resistor
identify the first band, write down the number associated with that color; in this picture it shows a 4 band resistor, first color is yellow and that's '4'.
now the next color is purple, so write down a '7' next to the four.
Now the third color is orange or the 'multiplier exponent' band and orange has three zeros and you see a big gap and next to it the tolerance is gold, that's ±5%
so we have '47x103
28 April, 2010
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