Measuring Strong Electric Current
The more electrons flow through a conductor in each second, the greater the strength of the electric current, commonly called strong currents. As much as 6.24 trillion electron flow (6.24 • 1018) per second on the conductor cross-sectional area, then this is known as a strong current of 1 Ampere. Thus it can be said:
Time = The electric charge
Strong currents
Ampere is the basic unit for legitimate strong electric currents in engineering has become a habit, so much simpler then magnitudes techniques such as strong currents replaced with symbols and formulas as well as for the symbol name of the unit (unit symbol).
A powerful symbol for the current formula is I
The symbol for the unit Ampere is A
Division and multiplication unit:
1 kA = 1 Kiloampere = 1000 A = 10 3 A
1 mA = 1 milliampere = 1/1000 A = 10 -3 A
1 A = 1 millionth microampere = A = 10 -6 A
In the “law on the magnitude in terms of the measurement of” strong since July 2, 1969 set as the amount of electric current to the base and the base unit 1 Ampere is defined with the help of the current energy reactions Strong currents in electrical engineering at distances ranging from a very broad:
Incandescent lamp: 100 to 1000 mA
Electric motors: 1 up to 1000 A
Smelting: 10 to 100 kA
Telephone: some A
How do I know the amount of electric current? Tools that can be used to determine the strong electric current is ammeters. On the measurement of strong electric currents, ammeters in series in an electrical circuit so that a strong current flowing through the same ammeters with a strong current flowing in the conductor. Note Figure 1.15!
How to install the ammeter on the electric circuit is as follows. a. Ammeters positive terminal is connected to the positive pole of the voltage source (battery). b. Ammeters negative terminal connected to the negative pole voltage source (battery). If the switch on the circuit is connected, then the incandescent lamp lit and the ammeter needle deviate from zero.
Large deviation needle on the ammeter shows a strong large current flows. If the switch is opened, the incandescent lamp goes out and the pointer on ammeters again pointed to zero. It means that there is no power on the circuit. Thus, it can be concluded that the electric current flows only in a closed circuit. Electric current measuring instrument is ampermeter, there ampermeter ampermeter analog and digital. When performing measurements measuring limit to be adjusted.
1 uA = 0.000001 A = 1.10-6 A;
1 mA = 0.001 A = 1.10-3 A;
1 kA = 1000 A = 1103 A;
1 MA = 1,000,000 A = 1,106 A
