Definition and Formulation of Electric Energy Unit
Understanding, Formulas, and Units of Electric Energy along with Examples of Complete Problems - Electrical energy is a basic need that must be met because without it there is any electrical energy every human activity will be difficult to do, because all the average activity using electrical energy.
In this discussion here will be a complete review of electrical energy. Therefore, let us consider the review below.
Formula and Electric Energy Unit
Understanding Electric Energy
Electrical energy is an energy that comes from an electric charge that causes a static electric field or the movement of electrons in a conductor (electric conductor) or ions (positive or negative) in a liquid or gas.
Electricity has an Ampere unit symbolized by A and an electric voltage symbolized by V with a volt unit provided that the wattage power requirement is symbolized as W. Electric energy can be created by another energy and can even provide an energy that can later be converted to energy another.
Electric Energy Formula
If in a circuit given a potential difference of V so that it carries an electrical charge of Q and an electric current of I, then the electrical energy required,
W = Q V with Q = I t
Information :
W = Electrical energy (Joules)
Q = Electric charge (Coulomb)
V = potential difference (Volt)
W is electrical energy in joules, where 1 joule is the energy needed to move a charge of 1 coulomb with a potential difference of 1 volt. So 1 joule = coulomb × volt.
While the charge per unit time is the strong current flowing, the electrical energy can be written, Because I = Q / t, the formulation is obtained:
W = (I.t) .V
W = V I t
If the equation is related to Ohm's law (V = I.R), the formulation is obtained
From the equations show that the amount of an electric energy depends on the charge, potential difference, electric current, resistance, and time. The greater the charge, the stronger the current, the potential and time difference, the greater the energy. As for obstacles, the greater the obstacles, the smaller the energy.
Examples of Electrical Energy Problems
A 110 volt electric solder is passed through 2 amperes. How much heat energy is generated after the solder has a current flowing for 20 minutes ???
Settlement
Known :
V = 110 volts
I = 2 amperes
t = 20 minutes = 1200 s
Asked: W?
Answer:
W = V I t = 110. 2 1200 = 264,000 J = 264 kJ
So, the heat energy that is produced after being flowed for 20 minutes is 264 kJ
That is the full review Hopefully what is discussed above is useful for readers. That is all and thank you.