what is kirchoffs law?

Answer 1

Kirchoff postulated three empirical laws describing the spectral composition of light emitted by incandescent objects.

1) A hot solid object produces light with a continuous spectrum.
2) A hot tenuous gas produces light with spectral lines at discrete wavelengths (i.e. specific colors) which depend on the energy levels of the atoms in the gas. (See also: emission spectrum)
3) A hot solid object surrounded by a cool tenuous gas (i.e. cooler than the hot object) produces light with an almost continuous spectrum which has gaps at discrete wavelengths depending on the energy levels of the atoms in the gas.

Kirchhoff's current law: The principle of conservation of electric charge implies that: At any point in an electrical circuit where charge density is not changing in time, the sum of currents flowing towards that point is equal to the sum of currents flowing away from that point.

Kirchhoff's voltage law: The principle of conservation of energy implies that: The directed sum of the electrical potential differences around a circuit must be zero. (Otherwise, it would be possible to build a perpetual motion machine that passed a current in a circle around the circuit.)

http://en.wikipedia.org/wiki/Kirchoff

Answer 2

Power quadrants are voltage, V, Power, W, resistance, R and finally current, I , Knowing any two quantites allows the other two to be located, For example, If you have a IK resister and measure a voltage of 10 volt DC across its terminal, Then the V2/R or 10MA similary, The power developed in the resistor will be V2/R or 100MW

Answer 3

rahul says "If you have a IK resister and measure a voltage of 10 volt DC across its terminal, Then the V2/R or 10MA"

No. 10MA is 10 mega amperes.

The current will be 10mA, i.e. 10 milliamps.



And "similary, The power developed in the resistor will be V2/R or 100MW"

No. 100MW is 100 mega.watts.

The power in the resistor will be 100mW, i.e. 100 milliwatts.


You must learn the conventions regarding upper and lower case abbreviations.

See http://www.davidbridgen.com/conv.htm

Answer 4

Kirchoff Current Law

It states that the algebraic sum of currents at a junction equals zero.
Imagine that you are joining five or six pipes at a junction. You pump water through two of these into the junction and through the remaining pipes at junction water flows out. Since the junction itself does not store water, whatever quantity of water flowing into it must go out of it. That's your Kirchoff's Current law!

Voltage law.
this states that algebraic sum of voltages around a loop is zero. This is little more complicated than current to explain through mechanical analogies (because of nature of emf)
Imagine that a pump is pushing water at some pressure to multiple components connected in series and the water flows through all of them and returns to pump. Based on the friction offered to flow of water through these components pressure of water falls down as it passes from pump to components one by one and at the end it reaches zero and enters the pump again.
In this case the flow of water against friction requires pressure. Thus pressure drops across each component depends on friction. Now the sum of pressure drops of each of the components must be equal to the pump pressure.
If there are more than one pump, the situation does not change. You only need to add positive pressure of pumps and drops of pressure from each components.

https://www.electrikals.com/

Answer 5

Kirchhoff's circuit laws are two equalities that deal with the current and potential difference (commonly known as voltage) in the lumped element model of electrical circuits. Both of Kirchhoff's laws can be understood as corollaries of the Maxwell equations in the low-frequency limit. They are accurate for DC circuits, and for AC circuits at frequencies where the wavelengths of electromagnetic radiation are very large compared to the circuits.

kirchoffs current law:This law is also called Kirchhoff's first law, Kirchhoff's point rule, or Kirchhoff's junction rule (or nodal rule).

The principle of conservation of electric charge implies that:

At any node (junction) in an electrical circuit, the sum of currents flowing into that node is equal to the sum of currents flowing out of that node
or equivalently

The algebraic sum of currents in a network of conductors meeting at a point is zero.
Recalling that current is a signed (positive or negative) quantity reflecting direction towards or away from a node, this principle can be stated as:

\sum_{k=1}^n {I}_k = 0
n is the total number of branches with currents flowing towards or away from the node.

This formula is valid for complex currents:

\sum_{k=1}^n \tilde{I}_k = 0
The law is based on the conservation of charge whereby the charge (measured in coulombs) is the product of the current (in amperes) and the time (in seconds).

Uses[edit]
A matrix version of Kirchhoff's current law is the basis of most circuit simulation software, such as SPICE. Kirchhoff's current law combined with Ohm's Law is used in nodal analysis.

KCL is applicable to any lumped network irrespective of the nature of the network; whether unilateral or bilateral, active or passive, linear or non-linear.

kirchoffs voltage law:This law is also called Kirchhoff's second law, Kirchhoff's loop (or mesh) rule, and Kirchhoff's second rule.

The principle of conservation of energy implies that

The directed sum of the electrical potential differences (voltage) around any closed network is zero, or:
More simply, the sum of the emfs in any closed loop is equivalent to the sum of the potential drops in that loop, or:
The algebraic sum of the products of the resistances of the conductors and the currents in them in a closed loop is equal to the total emf available in that loop.
Similarly to KCL, it can be stated as:

\sum_{k=1}^n V_k = 0
Here, n is the total number of voltages measured. The voltages may also be complex:

\sum_{k=1}^n \tilde{V}_k = 0
This law is based on the conservation of energy whereby voltage is defined as the energy per unit charge. The total amount of energy gained per unit charge must be equal to the amount of energy lost per unit charge, as energy and charge are both conserved.

Answer 6

examine Kirchhof's Circuit rules in Wikipedia. all appropriate defined. the present regulation may be extra actual understood in case you consider modern-day flowing to the junction as +ve and flowing out as -ve. The voltage regulation is merely each and each and every of the voltages contained in the circuit is +ve (merely the series ones upload up) and that of the source is -ve. If more effective than one source is suitable in series they upload up contained in the -ve.

Answer 7

If you are smart enough to take classes that study this law, you are smart enough to read your text, or google it yourself.

Answer 8

Here is a web site with illustrations http://ecetutorial.engr.siu.edu/eng_diffeqnsk1.shtml

Answer 9

it is an electeronic law

Answer 10

find best answer at electricalinblood.blogspot.com