What is current?The conventional power is a positive charge chart shows the movement of a positive charge around the circuit, it goes from the positive terminal to the negative.
The flow of electrons around a circuit is opposite, the flow consists of electrons which are negatively charged. The electrons move from the negative terminal to the positive.
In electric power must be an amount of power to give 1A, 5A, 10 amps, etc. Power is measured in amperes. (microamperemetret = 1000000A) milli-amps are (mA = 1000A)
There are both AC and DC power.AC current is an alternating current, it is the power that we have home.DC is a DC, it is a flow of electric charge. DC power comes from batteries, solar cells and machines with Dynamo on.
Symbols
How is it measured?With a ammeter
Measure51? (0.02 A)Calculated
I=U/RI=1,5v/51?I=0,03A.
What is voltage?Voltage is the potential energy of a power supply that is stored in the form of an electronic charge. The tension is perceived as the force that pushes electrons through an electronic current around a circuit.The potential difference between two points is measured in volts (V) with the circuit. A constant voltage is called a DC voltage, a voltage that is variable is called an AC voltage. Voltage measured in volts, voltage is defined as the electric brake pressure required forcing an electric current of one ampere through a resistance. There are some different expressions of volt, which obviously have their importance. (Microvolt = 10-6 V), millivolt (mV = 10-3 V) or kilovolts (kV = 103 V). A voltage can be positive or negative.How is it measured?Voltage measured with a voltmeter. The formulary for voltage is
Det er gratis at oprette en konto