The flow of water is equivalent to the current. It can also be thought of as how much work needs to be done to transfer the potential energy per coulomb from one point to another. The water pressure at the end of the hose is equivalent to voltage or potential difference in an electric circuit. The potential difference or voltage, is simply an indicator of how much potential energy is gained or lost per coulomb, when it moves from one point to another. The water tank is like a storage battery and the water in the tanks is equivalent to the electric charge. And, the pressure pushes the charge electrons through a conducting loop. There is a hose at the bottom of the tank as shown in the below image. Voltage is the pressure of the power source that exerts on an electrical circuit. U cable nominal voltage between the phase conductors, for 3-phase U 3. Voltage AnalogyĬonsider a water tank placed at a certain height above the ground. U0 cable nominal voltage between the conductor and the metal covering or earth and. Resistance of wire or circuit or condcutor) \\ “r” stands for internal resistance of source. It is denoted by “E”.Mathematically \\\ \ \ \ E = I (R + r) \\ Where \\ “E” stands for Electromotive force \\ “I” stands for current \\ “R” stands for External resistance (i.e. And therefore, 1 Volt is equivalent to 1 joule per coulomb of charge. Through this equation, voltage is linked to charge and potential energy. The bigger the difference in energy, the bigger the voltage. Voltage is defined as potential energy per charge: Where V is the voltage, E is the difference in potential energy in Joules, and Q is the charge in Coulombs. EMF moves a charge from one pole to another pole inside a source. Voltage is a measure of the difference in electrical energy between two parts of a circuit. Think of it as a pump in a water system, only this pump is for electrons in a wire. In simpler terms, it’s like a push force that keeps the electrons moving continuously through the wire it’s connected to. Electromotive force is the voltage present at the ends of the source in the absence of current i.e EMF is the open circuit voltage. A voltage source is defined as a device that delivers electric power to a connected circuit. Resistance is a materials tendency to resist the flow of charge (current). Current is the rate at which charge is flowing. Resistance of wire or circuit or conductor).Įlectromotive Force (EMF) Electromotive Force is the energy which produces and maintains voltage inside an active cell. Voltage is the difference in charge between two points. Mathematically \\\ \ \ \ V = IR \\ “V” stands for voltage \\ “I” stands for current \\ “R” is External resistance (i.e. It is always lesser than EMF (Electromotive force). In other words, voltage is the difference between electric potentials of the two points. Voltage is the amount of energy required to move the unit charge from one point to another point in conductor or wire or circuit.
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