Now let's add one more factor to current and voltage:resistance, which is measured inohms. We can extend thewateranalogy to understand resistance, too. The voltage is equivalent to the water pressure, the curren
The first involves the use of 'conceptual bridges' connecting the abstract concepts of energy and power with concrete observations. The second makes use of an analogy, or model, to help students distinguish between the concepts of electric energy, current and voltage. The advantages and ...
Now we're starting to see the relationship between voltage and current. But there is a third factor to be considered here: the width of the hose. In this analogy, the width of the hose is the resistance. This means we need to add another term to our model: ...
You might find these chapters and articles relevant to this topic. Chapter Fuel cells 3.5.5 Overall performance The overall performance of PEMFCs may be evaluated on the basis of the current-voltage diagram, in the same way as for other electrochemical devices (see, e.g. Fig. 3.37). Figure...
Because voltage is an expression of potential energy, representing the possibility or potential for energy release as the electrons move from one "level" to another, it is always referenced between two points. Consider the water reservoir analogy: ...
Voltage Garden Hose Analogy How does voltage relate to the garden hose? Electrical voltage provides the energy to create the flow of electrons (Current) thru the water, and a Pump provides the energy to create the flow of water thru the hose. ...
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...
Find a straw and little peas that can move freely in the straw. Place the straw flat on a table and fill the straw with peas. When you pop one pea in at one end, a different pea should pop out the other end. This demonstration is an analogy for an electric current. Identify what ...
In analogy, the controlled current source presents a current source in which the value depends on the states of other elements in the circuit. If the current is a function of the voltage vx across any other elements in the circuit, namely, i=f(vx), the current source is a voltage-contro...
Electric current definition and calculations. Electric current definition Electrical current is the flow rate ofelectric chargein electric field, usually in electrical circuit. Using water pipe analogy, we can visualize the electrical current as water current that flows in a pipe. ...