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Why current and voltage are phasors?
The vertical component of phasors represents the quantities that are sinusoidally varying for a given equation, such as v and i. For example, if for a given circuit, the phasors for the voltage and the current are in the same direction for all instances, the phase angle between the voltage and the current is zero.
What are phasors and voltages?
All phasors are drawn referenced to the horizontal zero axis. Phasor diagrams can be drawn to represent more than two sinusoids. They can be either voltage, current or some other alternating quantity but the frequency of all of them must be the same. All phasors are drawn rotating in an anticlockwise direction.
Why is KCl applicable in a high frequency circuit?
KCL is applicable on the assumption that current flows only in conductors and wires. While in High Frequency circuits where, parasitic capacitance can no longer be ignored. In such cases, Current can flow in an open circuit because in these cases, conductors or wires are acting as transmission lines.
How is Kirchhoff’s current law related to KVL?
Kirchhoff’s Current Law is applicable to any lumped parameter electrical circuit. An electrical circuit can contain at least one or more closed loops (mesh, network). Kirchhoff’s Voltage Law (KVL) states that, for any loop in an electrical circuit, the sum of the electrical voltage across the loop is zero.
Specifically, current leads voltage by 90 degrees. Rewriting equation #4 in phasor form gives us: I c = ω C V m ∠ ( ϕ + 90 ∘) I c = ω C V m e j ( ϕ + 90 ∘) I c = ω C V m e j ϕ e j 90 ∘ ( E q n 5)
Why is KCl simpler than a parallel circuit?
Looking at the figure above, you can see that none of the resistors are in series or parallel, so this can’t be simplified. Also note that there are no voltage sources, just current sources, which makes KCL simpler.