UNI!!!
Sunday, June 13, 2010
AC SINE WAVES AND MORE...
< That is a ac sine wave.
R.M.S stands for root means squared. value is peak value x .707
peak is the + of the sine wave were as the trough is - of the sine wave.
Peak to peak is 325 negative and 325 positive = 650 v.
Frequency is the hz which is 50hz= 50 x per sec.
the time of wave length is 360 from signal one.
Sunday, May 30, 2010
FlUxLiNeS.
The four rules of flux lines are as follows,
1. they travel north to south.
2.If a current-carrying conductor is grasped with the left hand, with the thumb pointing in the direction of electron current flow, the fingers will point in the direction of magnetic lines of flux.
3.Unlike poles attract each other.
4.they always try shoten
1. they travel north to south.
2.If a current-carrying conductor is grasped with the left hand, with the thumb pointing in the direction of electron current flow, the fingers will point in the direction of magnetic lines of flux.
3.Unlike poles attract each other.
4.they always try shoten
Sunday, May 23, 2010
EXAM!
Tomorow there is a exam....but not just any exam , a maths theory.I think that there will be
vectors
networks
si units
resistors
percentages
e12
force
resistors
vectors
networks
si units
resistors
percentages
e12
force
resistors
Sunday, May 2, 2010
resistor colour code.
we covered resistor color codes last week. In that lession we learnt how to read a colour sheet and figure out what resistance certain resistors are.As you can see to the right its rather straght forward to read , apart from how to figure out the tolirance which you divied the value of resistor by 100 then x it by the tolerance percent.
Sunday, April 18, 2010
computer eganomicks
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