12/29/2023 0 Comments Watt formula electricalUsing the information on the microwave label, the wattage is equal to Voltage x Current = Wattage. If the voltage and current are listed on an appliance but the wattage is not, the wattage can be calculated by multiplying the voltage by the current. The wattage of the microwave is 600 watts. The 60 HZ number means that the current alternates at a rate of 60 times per second. The information on the label tells us that the microwave oven needs 120 volts of electricity in the form of alternating current (AC) to operate, and draws 5 amps (amperes) of current during its use. X-15Z 120 Volts AC 5 A 600 Watts 60 HZ Made in USA For example, a label on a microwave oven may look like this:ĪCME, Microwave Oven Model No. Wattage and other electrical information is often listed directly on the appliance or equipment. The relationship between the wattage, time of use, and the energy used by an appliance or piece of equipment can be expressed by this formula: Wattage (Power) x Time = Energy Useīy using this formula, we can compare the energy used by electrical appliances and equipment to see which ones use the most electricity. For instance, a 1,200-watt microwave used for only 30 seconds uses less energy than a 600-watt microwave does in one-half hour. However, an appliance with a higher wattage will not use much energy if it is used for only a few seconds, whereas an appliance with a lower wattage may use a lot of energy if it is used for a number of hours. For example, a 1,200-watt microwave oven uses twice as much electrical energy and produces twice as much heat in one minute as a 600-watt microwave oven. The higher the wattage, the greater the amount of electrical energy that an electrical appliance or piece of equipment uses over a period of time. Electrical power is usually measured in watts hence, electrical power is often referred to as wattage. Power is the rate at which energy is used, or work is done, per unit of time. Power and time of use are the factors that determine how much energy is used by an electrical appliance or piece of equipment. These two laws are directly involved in all electrical phenomena and will be invoked on numerous occasions to explain both specific effects and the general behavior of electricity.Unit 4: Energy Through Our Lives-Part II Section F. The expressions for series and parallel resistance are derived from the laws of energy and charge conservation, which state that total charge and total energy are constant in any process. So, using this formula we can calculate power in series and parallel circuits. Where, $ I $ is electric current flowing through the circuit To determine the equivalent resistance $ \operatornameresistance \right) \\ The current flowing through a parallel branch is proportional to the resistance of the branch. As an example: A series circuit is made up of three resistors with resistance values of 5 ohms, 10 ohms, and 15 ohms.Ī parallel circuit has the same voltage across each branch that is equal to the source voltage. Total power (PT) is defined as: PT = P1 + P2 + P3. The total power in a series circuit is equal to the SUM of the power dissipated by the individual resistors. In a parallel circuit, all components are connected across each other, resulting in exactly two sets of electrically common points. In a series circuit, all components are connected end-to-end, forming a single path for current flow. Horsepower (hp), which is approximately equal to 745.7 watts, is sometimes used to describe the power of motor vehicles and other machines. Watt (W) is the SI unit of power, which is joules per second (J/s). Hint :We can define power as the rate of doing work it is the amount of work done in a given amount of time.
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