Topic: Voltage, current and power converters.
69-20Elita
Abdullayev Shermuhammad
plan
What is the Current?
What is the Voltage?
What is the power?
Voltage and current are the cornerstone concepts in electricity. We will create our first mental models for these basic electrical quantities. We will also talk about power, which is what happens when voltage and current act together.
Current Current is the flow of charge.
Current is reported as the number of charges per unit time passing through a boundary. Visualize placing a boundary all the way through a wire. Station yourself near the boundary and count the number of charges passing by. Report how much charge passed through the boundary in one second. We assign a positive sign to current corresponding to the direction a positive charge would be moving.
Voltage Electric voltage - is a physical quantity equal to the work done by electric and external forces in moving a unit positive charge in a specific part of the circuit.
Power We can define power as the rate of doing work, it is the work done in unit time. The SI unit of power is Watt (W) which is joules per second (J/s).
What is Power?
