Nov 15, 2019 Contoh Soal Rotasi Pengertian Soal Dan Pembahasan Rotasi Perputaran Dengan Matriks Pelajaran Soal Rumus Perputaran Wardaya College Transformasi Geometri Matematika. Jika kita menggunakan amplifier 200 watt dengan load impedansi 4 ohm maka sistem dapat dibangun dengan 4 buah speaker box yang masing-masing speaker box menggunakan 2 buah speaker berimpedansi 8 ohm berdaya 25 watt yang diseri. Total impedansi masing-masing box speakernya menjadi 2 X 8 ohm = 16 ohm. Sehingga impedansi total dari keempat box.
Impedance of inductor and impedance of capacitor are special cases of the general representation of impedance. Impedance of inductor (also called inductance or inductive reactance) is the measure of the opposition to a change of the electrical current in this component.
It can be summarized, in a very general way, that an inductor lets the low frequencies signals pass (including the 0 Hz signals) and blocks the high frequencies signals.
The formula of the impedance of inductor is: Z = jLw , where:
- Z: is the impedance in ohms
- j: is the operator for imaginary numbers. (imaginary unit)
- L: is the value of the inductor in Henrys (H)
- w: is equal to 2.π.f, where the letter f represents the frequency of the signal applied to the inductor. (frequency unit is Hertz).
The “j” operator is not used with resistors because there is no phase difference between voltage and current. In other words, the voltage and current in a resistor are in phase.
w (angular frequency).
The value w depends directly on f (the frequency) and is measured in radians/sec. (w = 2.π.f)
For example for a frequency of 300 hz, w = 2.π.f = 2 x (3.1416) x 300 = 1884.96 rad / sec.
How to calculate the Inductance of inductor?
To calculate the inductance of an inductor we use the formula Z = wL.
Example 1:
How to obtain the impedance of a 25 mH inductor at 300 Hz.
Z = 2 x π x 300hz x 25mH = 2 x (3.1416) x 300 x 0.025 = 47.124 ohms
Example 2:
Rumus Impedansi Ekivalen Trafo
How to obtain the impedance of a 25 mH inductor at 50 Hz?
Z = 2 x π x 300hz x 25mH = 2 x (3.1416) x 50 x 0.025 = 7.854 ohms.
It can be seen from the two previous examples, where the value of the inductor is the same (25 mA), that the impedance is higher for higher frequencies. It can be summarized that the inductor let pass low frequencies signals (there is low impedance) and blocks the high frequencies signals (there is high impedance).
Example 3:
How to obtain the impedance of a 12 mH inductor at 60 Hz?
Z = 2 x π x 60hz x 12mH = 2 x 3.1416 x 60 x 0.012 = 4.524 ohms.
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