beginning simple circuits analysis with kirchoffs laws
i’ve been rather consistent in my electrical learning with regards to schedule. the concepts, compelling, and i plan to drill the fundamentals (minus the hardcore physics stuff) in my head. my officemates have been more than helpful in explaining and teaching me the ways of electricity.
[ teaching the mind to do tricks is painful ]
the past nights, i’ve covered Ohm’s law and have solved some beginner problems.BUT - the thing i found frustrating at first was determining if a specific circuit is series or parallel - especially in bigger circuits with multiple paths. anyway, i’m over that frustration now and i’m beginning to have that automatic mental ability of re-drawing a circuit in my mind so i can see things clearly.
[ kirchoff’s law ]
“The algebraic sum of the currents into any point of the circuit must equal the algebraic sum of the currents going out of that point”
and
“The algebraic sum of all voltages in a loop must equal zero”
the first sample circuit problem is outlined below: solve for the current across resistor R3.
i reached only up to the two equations part since the I1 terms of both equations could not cancel out each other.
stuck halfway…
i still had 2 unkowns (I1 and I2). turning to the book, it said i need to normalize I1 in such a way that subtraction of those two equations will cancel out the terms with I1 - multiplying the second equation by 4.
there are many more problems i plan to solve but i’ve had enough kirchoffs law for one day.
Ha, its no wonder the job was for Com Eng students lol. Good job learning through it haha.
Comment by Dino Bansigan — October 17, 2009 @ 12:12 am
yo bro. thanks! posting something about electronics has always been one of my plans … but i actually lacked the skill set so i’ve been yearning for the time to actually just get some hands on. this is my new hobby.
Comment by stefanie — October 17, 2009 @ 6:43 pm