Voltage, also known as electric pressure, electric tension, or (electric) potential difference, is the difference in electric potential between two points. In a static electric field, it corresponds to the work needed per unit of charge to move a test charge between the two points. In the International System of Units, the derived unit for voltage is named volt.: 166 The voltage between points can be caused by the build-up of electric charge (e.g., a capacitor), and from an electromotive force (e.g., electromagnetic induction in generator, inductors, and transformers). On a macroscopic scale, a potential difference can be caused by electrochemical processes (e.g., cells and batteries), the pressure-induced piezoelectric effect, and the thermoelectric effect.
A voltmeter can be used to measure the voltage between two points in a system. Often a common reference potential such as the ground of the system is used as one of the points. A voltage can represent either a source of energy or the loss, dissipation, or storage of energy.
guys, may makakasolve kaya nung prob ng cpu ko. naglow voltage siya, yon nakalagay sa monitor then after nung araw na yon, biglang tumunog at ayaw mag on ng 1-2 lights.
pahelp naman po. 😭
1. The function of a potential transformer or PT is to ________________
2. Which transformer uses a single winding to produce voltage transformation?
________________________.
3. The function of the autotransformers used with the starters of large AC motors is to provide_______________...