0
Voltage is a defined as a difference in potential. So to measure voltage, you need to look at the difference in potential between two different nodes in a circuit. For example, to know the voltage of a capacitor, you are looking at the difference in potential from one terminal of the capacitor to the other. Even if it is installed in a circuit. It is for this reason, that the measurement is across the circuit, or in parallel with it. One common point of confusion in voltage measurement is the way it is presented. Someone will say, that wire is at 5 volts. The "with reference to" part is often left off. We can say this because most circuits have a direct or implied ground, that all other voltages are referenced to. So the correct thing to say would be "that wire is at 5 volts to ground."
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoA "voltage" is a property which arises between two points that are at different electrical "potentials".
To measure a voltage a voltmeter has to be placed across a source of potential difference.
So, if the voltage drop across a resistor was needed, a voltmeter would need to be connected across the resistor, which is the same as saying it would have to be connected in parallel with the resistor.
If the current flowing through a resistor was needed then an ammeter would need to be connected in series with the resistor.
Add your answer:
Earn +20 pts
How the voltage circuit work?
i.e normally we have various sensors to measure the voltage but my doubt is, how the voltage circuit measures the voltage i.e i need the detail for each and every unit.... If anybody know means plz tell to me.....
How do you add a fixture to an electrical circuit?
Any devices that are added to a circuit and need the full line voltage to operate, are added in parallel to any other load devices or fixtures in the circuit.
What has a larger current the parallel circuit with 1 resistor or the parallel circuit with 2 resistors?
By Ohm's law, current is voltage divided by resistance.In order to determine which circuit draws more current, you need to look at voltage and resistance. Assuming similar voltage, then, less resistance would result in more current.Now you need to know the values of the resistors in both cases. You did not state those important pieces of information. The net resistance of two resistors, R1 and R2, in parallel is R1 time R2 divided by (R1 plus R2). All you need to do is calculate for the two cases.If the two resistors were the same, you can generalize the answer by saying that, with contant voltage, two similar resistors in parallel will pull more current than one similar resistor - specifically, two will pull twice the current of one.
How will you convert a open current circuit to a open voltage circuit?
The first thing you need to know is the internal resistance of the current source, the voltage source will have the same internal resistance. Then compute the open circuit voltage of the current source, this will be the voltage of the voltage source. You are now done.
What are the images of series and parallel circuit?
parallel circuit, a circuit containing two or more subcircuits connected across each other allowing current flow to divide between them, the voltage across all of these subcircuits is identicalseries circuit, a circuit containing two or more subcircuits connected inline with each other allowing the voltage to distribute across them, current flow through all these subcircuits is identicalopen circuit, a circuit with a break (or opening) in it, preventing current from flowingclosed circuit, a circuit with no breaks (its fully closed) in it, permitting current flowshort circuit, a circuit having an unintended low impedance path (or shortcut path) somewhere in it causing current flow to bypass one or more subcircuits within the circuit; this often causes excessive current flow and damage, unless a fuse melts or a circuit breaker pops to create an open circuit and thus protect things
Is the series circiut form capable for house wiring?
No, it isnt, you need a parallel circuit to be able to have the same voltage in each voltage taking point
How the voltage circuit work?
i.e normally we have various sensors to measure the voltage but my doubt is, how the voltage circuit measures the voltage i.e i need the detail for each and every unit.... If anybody know means plz tell to me.....
How do you add a fixture to an electrical circuit?
Any devices that are added to a circuit and need the full line voltage to operate, are added in parallel to any other load devices or fixtures in the circuit.
Advantages of parallel circuit?
A parallel circuit can run several devices using the full voltage of the supply, varying the current to the need of each device. If one device fails, the others will continue running normally. If the device shorts, the other devices will receive no voltage, preventing overload damage.A series circuit divides the supply voltage among the devices with a consistent current. If one device fails, all other devices in the circuit will either fail to receive voltage or receive too much voltage and become damaged in the case of a short.An advantage of parallel circuits is increasing the power rating of the circuit and reducing the resistance.
What happens when voltmeter is connected in parallel?
An ideal voltmeter has infinite impedance(resistance). If you were to break the circuit and put it in series and try to make a measurement, it is easy to see that the circuit would act completely differently and your measurement would be wrong. An ideal ammeter is always connected in series because it has 0 resistance, so all of the current would flow through it, and not through the wire that you are trying to measure the current of.A better answer though is to think about what you are trying to measure. When you say something is 3 Volts, that is a difference between the voltages at two different points. If you want to see what the voltage drop across a resistor is, for example, you need to put one probe of the voltmeter on one side of the resistor and the other probe on the other side of the resistor. That setup is simply called being in parallel.Voltage is potential difference between two points, hence measured across or in parallel, where as current is measured in series since current flows (*)
What do parallel circuit NOT have in common with series circuit?
A parallel circuit is different in many ways from a series circuit: 1. In parallel, the voltage across all the devices connected is the same. 2. If a fault occurs in any device connected in parallel combo, then it has no effect on the operation of the other device. 3. In series circuit the current flowing through all the devices is the same while in case of the parallel one the voltage across all the devices is same.
What has a larger current the parallel circuit with 1 resistor or the parallel circuit with 2 resistors?
By Ohm's law, current is voltage divided by resistance.In order to determine which circuit draws more current, you need to look at voltage and resistance. Assuming similar voltage, then, less resistance would result in more current.Now you need to know the values of the resistors in both cases. You did not state those important pieces of information. The net resistance of two resistors, R1 and R2, in parallel is R1 time R2 divided by (R1 plus R2). All you need to do is calculate for the two cases.If the two resistors were the same, you can generalize the answer by saying that, with contant voltage, two similar resistors in parallel will pull more current than one similar resistor - specifically, two will pull twice the current of one.
How will you convert a open current circuit to a open voltage circuit?
The first thing you need to know is the internal resistance of the current source, the voltage source will have the same internal resistance. Then compute the open circuit voltage of the current source, this will be the voltage of the voltage source. You are now done.
How do you measure the voltage by looking at a breaker box in a home?
You don't. You need test equipment to measure voltage.
When measuring voltage do the probes need to be in series or parallel to the load?
Parralel
Which uses more energy parallel circuit or a series circuit?
That depends. For example, if the circuit is consisted of two resistors, 2 ohms each, the equivalent resistance (Req) of these two resistors in series is 4 ohms, and the Req of these two resistors in parallel is 1 ohm. If the same voltage is applied, say 4 V.power consumed in a resistance = V2/R.The parallel circuit: Power = 4 * 4 / 1 = 16 [W].The series circuit: Power = 4 * 4 / 4 = 4 [W].With everything else the same, a parallel circuit consumes more energy than a series circuit.Note that circuits of only simple resistors are discussed. You need to consider each circuit on its merit.================================AnswerIt depends. In both cases, the total energy expended will be the sum of the energies expended by each individual load.
What is the advantage of wiring two light bulbs in parallel?
A series circuit only has one path for the electrons to travel, but a parallel circuit has multiple paths for them to travel in. When a bulb goes out in a series circuit, the circuit breaks and all bulbs go out, but in parallel circuit, if a bulb breaks, the other bulbs stay on
