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Kirchoff's voltage law: In a series circuit, the signed sum of the voltage drops around the circuit add up to zero. Since a parallel circuit (just the two components of the parallel circuit) also represents a series circuit, this means that the voltage across two elements in parallel must be the same.
Kirchoff's current law: The signed sum of the currents entering a node is zero. In a series circuit, this means that the current at every point in that circuit is equal. In a parallel circuit, the currents entering that portion of the circuit divide, but the sum of those divided currents is equal to the current supplying them.
Wiki User
∙ 14y ago
Wiki User
∙ 12y agoin parallel voltage remains same in all branches.....nd current divides among all branches....
Wiki User
∙ 12y agoIn a parallel circuit the node voltage is constant while the node current varies from one branch to another .
Wiki User
∙ 9y agoThe supply voltage is common to each branch. The supply current is the sum of the branch currents.
Wiki User
∙ 6y agoVoltage is the same for all parallel branches - the current is independent in each.
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Explain why buildings are wired using parallel circuits rather than series circuits.?
Homes are wired in parallel because of basic electrical theory. If something in a series circuit fails, the electrons cannot flow anymore. The WHOLE circuit is now down. Also, the voltage would drop after every resistance. A breaker is on each separate circuit in your house as protection. Those separate circuits are broken down even more as parallel circuits. When you unplug something, the whole circuit isn't affect (well, current, but you can still use your other electronics). Also, voltage must be at a certain level for all our things. In series, the resistance would lower the voltage, which can harm electronics designed for higher voltages.
What happens when one light bulb out of three goes out in a parallel circuit?
When three light bulbs are in parallel the voltage V on each is the same. Each bulb draws a certain amount of current, i1, i2, & i3. If all three are working they draw a total current I = i1 + 12 + 13 from your power source. And the energy they use is ,I x V. When one bulb goes out then the only thing affected is i3 = 0. The voltage is the same but the total current from your power source is less and therefore the total energy used is less. So nothing happens to the other two bulbs (that's one reason why all household outlets are in parallel) and you just use less energy.
One way to make current is to use a what?
You can apply a potential difference across a wire to cause a current to flow through. Ohm's Law allows you to calculate the amount of current based on the voltage supplied and the resistance of the circuit. I = current V = voltage or potential difference R = resistance I = V/R
If a circuit has a voltage drop of 60.0 V across a 120.0 resistor that carries a current of 0.500 A. What is the power conducted by the resistor Use P VI.?
Well, if the question says "use P = VI", just do it! You have the values of voltage (V) and current (I) right there.
Why do people use alternating current in your nomes today?
The use of alternating current permits voltages to be altered via transformers, so for efficiency the voltage at the generator can be stepped up for transmission to reduce losses and cost, then stepped down again at the user's end to whatever voltage is needed. For safety reasons homes use a lower voltage than does industry. Multi-phases can be used to give more than one voltage from the same supply without transformers.
The electric bulb in your household circuits are connected in parallel what happens to the line current and line voltage as you turn on more light bulbs?
The line current increases when more bulbs are switched on in parallel, since more parallel current paths results in lower effective resistance. The line voltage should not change in response to any normal use of electric power in a single house.
Do relays use high voltage to control low currant circuits?
Low voltage to operate relay controlling high CURRENT circuits (currant is a dried fruit).
How are parallel circuits and series circuits alike?
in parallel the voltage stays the same in parallell the current is shared in series the voltage is shared in series the current stays the same the main similarity between parallel and series circuits is when voltage increases, current increases.
What is the potential difference and current characteristics in a series and parallel circuit?
In a simple parallel circuit -- for example, two resistors in parallel with a voltage source -- the voltage across the terminals of each component is the same. The current, however, 'splits' in order to take the two separate paths. In this case, you would use Ohm's law to find the current through each branch. In other words:I1=V/R1, I2=V/R2.If you have a current source instead of a voltage source, you would use current division to calculate current:I1=Isource*R2/(R1+R2), and I2=Isource*R1/(R1+R2).This is all in contrast with a simple series circuit, in which the current is the same through each component but the voltage drops are different. In which case you would use Ohm's law or Voltage division to calculate the individual voltages, depending on the source.
What is the use of series and parallel resonance?
Series resonant circuits have their lowest impedance at the resonant frequency. Parallel resonant circuits have their highest impedance at the resonant frequency. This characteristic is exploited in the design of filters, oscillators and other circuits.
Why kirchhofs is use parallel in circuit?
Note about the spelling: Kirchhoff has a double "f". Basically, Kirhhoff's Laws are valid under a wide variety of situations. Specifically, you can use them in both parallel and series circuits, and in more complicated cases (such as multiple current loops). In the case of parallel circuits:Kirchhoff's Voltage Law tells us that the voltage between the two endpoints is the same, no matter what route is taken.Kirchhoff's Current Law tells us that the sum of the currents in the different branches must be equal to the total current before (or after) the parallel branching.About the question, "why use these laws?" - basically, because they help us figure out the circuit.
How could you quickly determine if a string of lights is wired in a series or parallel circuit?
In a series circuit, the same amount current flows through each light. And each bulb has a fraction of the total voltage. If you remove one light, the current stops flowing. The makes all of the lights be dark. This type circuit is not used in your house, because every light is designed to operate at 110 volt. In parallel circuit, the voltage is the same for each light. The total current is split between the branches of the parallel circuit. I suggest that you use your computer to search for images of series and parallel circuits. As you look at the drawings, you will see the difference between these two types of circuits.
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 do electrical circuits in homes use?
parallel
What is the equivalent resistance through the enire circuit of 90 volts?
Not enough information. In the case of simple circuits, usually you would add resistances that are in series, and use a slightly more complicated formula for resistance that are in parallel. You CANNOT determine an equivalent resistance known only the voltage. However, if you know the total current, you can divide the voltage by the total current to get the equivalent resistance.
Why do modern homes use parallel?
we use parallel circuits because with parallel circuits the electricity goes through the whole houseBy: Harjeet Badhan Parents: Harbhajan Singh and Suamn Jeet
When would you use current transformer?
A 'current transformer' (CT) is classified as an instrument transformer, which means it is used to provide a small secondary current that is in proportion to its large primary current, for purposes of metering or protection. At the same time, it electrically-isolates the secondary (metering) circuits from the primary circuits (which are often high-voltage circuits) for the purpose of safety.
