What is watts law

The rate of flow of an electric charge, measured in amperes or amps. When one coulomb of charge moves past one point in once second, current is said to flow at a rate of one ampere. Current flows from negative potential to a positive potential through a load. The unit used to measure power in an electric circuit, equivalent to one joule per second, or the power dissipated when one volt pushes one amp through a circuit.

The unit used to measure electrical current. It is equal to a flow of one coulomb per second. It may also be called "amp. Skip to content Electrical Terms and Definitions. Current can only flow when there is a difference in electrical potential. Resistance R is the opposition to the flow of current.

This law states that the current passing through a conductor is directly proportional to its voltage, i. Power P is a measure of the quantity of work a circuit can do, or a component can consume per unit time.

Simply put, it is the amount of electrical energy transferred per unit time. However, you can combine these laws to get useful formulas. You must be logged in to post a comment. Facebook-f Linkedin Twitter. November 25, John Mitchell. Share on email Email. Share on facebook Facebook. Share on twitter Twitter. Share on pinterest Pinterest. Share on linkedin LinkedIn. Log in to Reply.

Leave a Comment Cancel Reply You must be logged in to post a comment. Join our Newsletter. Email Address. Recent Posts. Your electric company normally charges you for your usage in Killo-Watt Hours kWh. One kWh is the amount of energy necessary to do Watts of energy for one hour - in other words to keep 10 W light bulbs shining for one hour.

In order to be able to analyze more complicated circuits, we need to introduce two more circuit concepts. The first is known as Kirchhoff's Voltage Law. It is usually stated as, "The sum of the voltages around any closed circuit must be zero.

This explains why the voltages across the battery and across the resistor in the above circuit are the same. Electrical components are connected together by nodes in the total network of elements. Kirchhoff's Current Law states that the sum of the currents entering a node must equal the sum of the currents leaving a node. This law is a consequence of the conservation of charge electrons in electrical networks. Here are some important consequences of Kirchhoff's Current Law.

See if you can derive them. When two resistors are connected in series, their combined resistance is equivalent to the sum of their individual resistances. We can use Ohm's law to calculate the voltage drop around each of the individual resistors after calculating the voltage drop accross the total resistance. When two resistors are placed in parallel in a circuit, their combined resistance is equal to the product of the individual resistances divided by their sum. Smaller total voltage for parallel in contrast to larger for series.

One again we use ohm's law to calculate the voltage across the resistors same for both and the current through each resistor. Often we would like to set a "default voltage" for a circuit.