Electricity is a natural phenomenon that occurs throughout nature and takes many different forms. In this tutorial we'll focus on current electricity: the stuff that powers our electronic gadgets. Our goal is to understand how electricity flows from a power source through wires, lighting up LEDs,...
Current flow in a circuit is normally designated by the letter ‘I’, and this letter is used in equations like Ohms law where V=I⋅R.What is electric current: the basicsThe basic concept of current is that it is the movement of electrons within a substance. Electrons are minute ...
In terms of your water analogy, to make water flow in a river, there has to be a drop in height (=voltage) from start to finish. If there is a (=capacitor !) in between, it will halt the flow of water, until the sluice is overflowing and the height difference asserts itself again...
Also its cross sectional area is made wide enough to carry the current without any undue resistance.In some instances it is necessary to have elements which resist the flow of current. These items are called resistors and they are made out of materials which do not conduct electricity as well...
Capacitance (XC).The amount of electrical charge stored in the circuit. A component such as a capacitor is often used to generate capacitance. Both inductance and capacitance are measured in ohms. Together, they're referred to as the circuit'sreactance(X), which is also measured in ohms. Re...
It is the fundamental law in electricity. it is used for the calculations of R, V and I for the part of the circuit or entire circuit by using the forms. R= V/ I, V= IR and I= V/R Where V is in volts, I am inamperesand R is in ohms. ...
Ohm’s lawstates that “the current through a conductor between two points is directly proportional to the voltage across the two points.” We talk about resistors in Ohms. A resistor might be a 220 Ohm resistor, or it might be 6.8K Ohm resistor. To give you a frame of reference, somet...
Due to this added resistance, he had from the safety shoes, the circuit was not complete for electricity to flow through him to the ground. There is another factor why he was not electrocuted- his skin resistance and condition. The average body’s resistance ranges from between 1000 ohms to...
St Elmo's Fire is not harmful. Lots More Information Related HowStuffWorks Articles How Electricity Works How Lightning Works How Fire Works How Atoms Work What are amps, watts, volts and ohms? More Great Links Scientific American: "What causes the strange glow known as St. Elmo's Fire?"...
What is the concept of magnetic induction, and resonance within coils? How is this different than resonant induction? In an electric motor, what are the physical units that explain the convention of energy and its rendiment? Why should a 330 ohms resistor be used for LED in a light dependent...