How do I explain Ohm's Law to a child?
Actually pretty easy to do if one uses plumbing as an analogy. Pipes are wires and the water is the electricity. The water pressure is the voltage and the current is the amount of either water or electrons flowing through the conductor. The resistance is something which restricts the flow of water. E = IR means the water pressure is going to be equal to the current times the resistance. It is important to note that the "E" term is actually a difference in voltage between two points in a circuit. In many circuits it is simply the difference between the voltage and the ground, which has zero voltage. Another thing most people don't realize is the positive terminal on a battery is an electric vacuum. It draws current from anything which has electrons.
Can someone please explain Ohm's Law?
I'd prefer it in pretty simple english, not because i'm thick, but because every site i've found goes into extreme details. I know it's something to do with the relationship between voltage, current and resistance (V= I x R), but thats as far as it goes
How would you explain Ohm's law to someone?
Firsts let’s break down the Variables;V = IR where V = VoltageI = Current and R = Resistance.Now Imagine a Faucet. The Voltage there is the Internal Pressure within the pipe. So the more pressure the greater for Voltage. Voltage in a sense is like the factor that Pushes the current to a circuit. So in order to get a good current flow, you need a strong potential push. Current is simply the water flow in the faucet, nothing fancy yet until we add the resistance. The resistance there is how we turned the faucet. If you open it fully, the water flows at maximum. Imagine a fully opened faucet is like a circuit with a very very low resistance. In some events, when there is few water in your tank or in the pipe, current may flow very slow or few even if we fully turn the faucet open. So even if there is less resistance, if you don’t have enough pushing power, then our current will still be small.Note: In real li
Could someone explain Ohm's Law and how it works?
Ohm's law states that voltage = current * resistance, so the voltage you're after is: 1.98*10^(-4)*100 = 1.98*10^(-2) volts. See the reference given in the source for a more thorough explanation (it also includes a calculator to solve this type of problem).
Can anyone explain what each wire on an audio output transformer (1k ohm center tapped to 8 ohms) is for?
If your circuit isn't asking you to use the center tap, then it isn't vital. However, you shouldn't connect it to anything -- it is there for other possible circuit configurations and if you do connect it (like to ground), it can mess up your circuit's operation. The center tap on the 1k ohm side is used in different circuit configurations. You may have a single transistor/amplifier driving the transformer, so you'd have the output go to one lead and ground the other, leaving the center tap open. Another circuit could have two transistors/amplifiers (a push-pull system), so one amp could be connected to the top half, one amp connected to the bottom half, with the center tap grounded. It's easy to put a center tap in when you make a transformer, so the product is useful for many more projects than just a regular two tap transformer. Since you can use the center-tapped transformer without connecting the center tap to anything, it can easily be used in those two tap transformer projects. That lets the manufacturer make more of one thing, which brings their costs down, and hopefully yours, too.
How do I explain Ohm’s law using a water hose analogy?
I like this one, visual and informative.Voltage: Voltage is the pressure which forces the electrons to flow in a particular direction in a conductor. The unit of voltage is Volt and denoted by V. Battery is a good source of voltage. 3V, 3.3V, 3.7V and 5V are most common in electronic circuits and devices.Current: Current is the flow of electrons in a particular direction. More formally, the current is the rate of change of electron in a particular direction. Unit of current is Ampere and denoted by I. In electronic circuits current is in milliampere range (1 Ampere = 1000 milliampere). For example, a typical current for an LED is 20mA.Voltage is the cause and current is the result.Resistance: Resistance is the hindrance to the flow of charge or electron. The unit of resistance is The SI unit of electrical resistance is the ohm (Ω).There is an important relationship between these three quantities, voltage, current and resistance:V = IR or I = V / R or R = V / IThis relation is called Ohm's Law.Complete Guide for Tech Beginners
How can you explain capacitance and inductance to someone who knows only the Ohm's law?
I wouldn't explain it any differently to someone who only knows Ohm's law than I would to someone who also knows Coulomb's law and Ampere's law. Of course, they'd also have to know a little bit of calculus to really explain it.In a circuit, you have voltage and current as your measurable quantities, and they're related to each other by something that the components define.For a resistor, that relationship is V = I*RFor a capacitor, that relationship is I = C * dV/dtFor an inductor, that relationship is V = L * dI/dtAt this point I'd also explain that capacitors have another thing that can be considered separate from the circuit, and that other thing is charge displacement, related by Q = C*V.(From there I might also explain that displacement current I = dQ/dt, which explains the I = C dV/dt).I'd also explain that inductors have an analogous thing, which is stored magnetic flux, given by Phi = L * I.(From there I'd also explain Faraday's law, in which V = dPhi/dt, which explains V = L dI/dt).