kalauudah naik pesawat pada lupa kalo ada yang naik angkot.. mungkin ini bisa bantu dik.. drop tegangan tergantung besar R, sedang untuk Arus AC R impedansi simbul z berubah tergantung frekuensi dan sudut phase.. artikel ini moga ngebantu
[edit] Device examples The phase angles in the equations for the impedance of inductors and capacitors indicate that the voltage across a capacitor lags the current through it by a phase of π / 2, while the voltage across an inductor leads the current through it by π / 2. The identical voltage and current amplitudes tell us that the magnitude of the impedance is equal to one. The impedance of an ideal resistor is purely real and is referred to as a resistive impedance: In this case the voltage and current waveforms are similar and in phase. Ideal inductors and capacitors have a purely imaginary reactive impedance: the impedance of inductors increases with frequency; the impedance of capacitors decreases with frequency. In both cases, for an applied sinusoidal voltage, the resulting current is also sinusoidal, but in quadrature, 90 degrees out of phase with the voltage. However the phases have opposite signs: in an inductor, the current is lagging; in a capacitor the current is leading. Note the following identities for the imaginary unit and its reciprocal: Thus we can rewrite the inductor and capacitor impedance equations in polar form: The magnitude tells us the change in voltage amplitude for a given current amplitude through the impedance, while the exponential factors give the phase relationship. jadi simpulkan sendiri.. --- On Tue, 10/4/11, fikri achdan <[email protected]> wrote: From: fikri achdan <[email protected]> Subject: [FISIKA] Tanya Drop Voltage To: "[email protected]" <[email protected]> Date: Tuesday, October 4, 2011, 8:54 PM Dear Teman2 Fisika, Saya mau tanya, apabila tegangan AC dan DC dengan nilai yang sama dialirkan pada kabel yang panjangnya sama pula.Lebih drop tegangan mana, AC atau DC? Alasan dan dasar teorinya bagaimana? Terima Kasih seblmnya.... Best Regards Fikri A
