Have you ever wondered how or what makes an electric circuit function? A fact that many people don't realize is that almost every electric circuit can be analyzed with three very important laws. Those laws are Kirchoff's Current Law, Kirchoff's Voltage Law, and Ohm's Law. With some practice and the above stated laws in your tool bag, you can feel assured that you too can analyze electric circuits with the best of them. However, before we get into the nitty-gritty of defining and using these laws, I recommend that you first connect to the links that offer a little historical information about the two men that defined these fundamental laws for electric circuit analysis.
Gustav Robert Kirchoff was a German physicist born on March 12, 1824, in Konigsber, Prussia. Gustav Kirchoff's first research topic was on the conduction of electricity. As a result of this research, Kirchoff wrote the Laws of Closed Electric Circuits in 1845. These laws were eventually named after their author, which are now known as Kirchoff's Current and Voltage Laws. Because Kirchoff's Voltage and Current laws apply to all electric circuits, a firm understanding of these fundamental laws is paramount in the understanding of how an electronic circuit functions. Although these laws have immortalized Kirchoff in the field of Electrical Engineering, Kirchoff also had additional discoveries. Gustav Kirchoff was the first person to verify that an electrical impulse traveled at the speed of light. Furthermore, Kirchoff made major contributions in the study of spectroscopy and he advanced the research into blackbody radiation. Gustav Robert Kirchoff died in Berlin in October 17, 1887.
Georg Simon Ohm was a German physicist born in Erlangen, Bavaria, on March 16, ...
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...t is directly proportional to its applied voltage and inversely proportional to its resistance. In equation form, Ohm's law states
V = I*R
where
V is the applied voltage,
R is the resistance in Ohms,
I is the current in amperes.
Ohm's law demonstrates that if the applied voltage across a circuit is increased or decreased, the current generated in the circuit increases and decreases, respectively. Furthermore, as the resistance in a circuit increases, the current generated in the circuit decreases. The following are algebraic variations of Ohm's law that demonstrate theses observations.
I = V / R
R = V / I
Using one of the three algebraic variations of Ohm's law, and any two known variables, one can solve for the other unknown quantity.
The value of the reactance of a capacitor or an inductor can be expressed as a complex quantity by the complex operator j, j = −1 [11], and using this notation the reactance of the elements are given by [12]:
The reason I will test my theory is so I can see if ohm's law was
will result in an increase in the speed of the rate of reaction it has
After retiring he became a gentleman, which was an upstanding title in the eighteenth century. In 1751 he published his book entitled Experiments and Observations on Electricity. The findings in this book gained him quite a lot of fame. He invented the battery, and created new English words that could be used in the science of electricity, along with other discoveries.
The dependence of the rate of reaction on the reactant concentrations can often be expressed as a direct proportionality, in which the concentrations may be raised to be the zeroth, first, or second power. The exponent is known as the order of the reaction with respect to that substance. In the reaction above, the overall order of reaction is given by the following:
At the age of 32, he submitted his doctoral thesis. He was interested in health effects that are caused by movements of the heavenly bodies. Mesmer was inspired by Newton and works of alchemist Paracelsus. Newton was the first to talk about electricity back in 1687, but it was an unknown concept at
Who said electricity doesn’t exist. Benjamin Franklin is the person who invented electricity by flying a kite in the rain with a key on it. So when he got it in the air, it started to lightning and thunder, so then this big bolt of lightning struck the kite and electrocuted him and that’s how he discovered electricity.
gained at the cathode, so it can be said if you double the time you
Albert Einstein Albert Einstein was born on March 14, 1879 in Ulm. He was raised in Munich, where his family owned a small electrical machinery shop. Though he did not even begin to speak until he was three, he showed a great curiosity of nature and even taught himself Euclidean geometry at the age of 12. Albert despised school life, thinking it dull and boring, so when his family decided to move to Milan, Italy, Einstein took the opportunity to drop out of school, only 15 at the time. After a year with his parents in Milan it became clear to him that he would have to make his own way in the world. He finished secondary school in Arrau, Switzerland, and then enrolled at the Swiss National Polytechnic in Zurich. School there was no less exciting for him than it was before, and Einstein often cut classes, using the time to study physics on his own or practice on his violin. He graduated in 1900, but his professors did not think very highly of him and would not recommend him for a university job. Einstein worked for two years as a tutor and substitute teacher until in 1902 he found a position as an examiner in the Swiss patent office in Bern. In 1903 he married a fellow classmate at the polytechnic, Mileva Maric. They later divorced after having two sons, and Einstein remarried. Though Albert had written other papers, the one he became most famous for was called, “On the Electrodynamics of Moving Bodies,” which explained a theory that became known as the special theory of...
His name is Heisenberg. He worked mainly in Quantum Physics and was responsible for the development of the Principle of Uncertainty. This is one of the topics of this speech.
Where NA is the equivalent number of A transferred per cell during the interval of time t, Q the current quantity supplied to the system during the same time and F is the Faraday constant (96 485 A s mol−1).
Electricity and electrical components are a major part of our lives today. Our lives pretty much come to a halt if there is a power outage or if our electrical devices stop working, sometimes we even start panicking because we are so dependent on these components that we cannot afford to lose them and their importance and use only increases as time passes. We all use these electrical devices and also electricity itself but most of us do not think about the math and physics that works behind all of these things.
Hypothesis: As the ratio of surface area to volume of an object decreases the rate of heat loss from the object will also decrease. Objects with the same surface area to volume ratios loose heat at the same rate so long as there are not other variables involved.
Change in the resistance of a PTC thermistor can be brought about either by a change in the ambient temperature or internally by self-heating resulting from current flowing through the device.
Faraday continued his electrical experiments. In 1832, he proved that the electricity induced from a magnet, voltaic electricity produced by a battery, and static electricity was all the same. He also did significant work in electrochemistry, stating the First and Second Laws of Electrolysis. This laid the basis for electrochemistry, another great modern industry.