Contents
What is the rms current in the inductor?
The rms current Irms through an inductor L is given by a version of Ohm’s law: Irms=VrmsXL I rms = V rms X L where Vrms is the rms voltage across the inductor and XL=2πνL X L = 2 π ν L with ν the frequency of the AC voltage source in hertz. XL is called the inductive reactance.
How do you calculate rms current in a circuit?
Use equation 24-15 to calculate the impedance of the circuit, and then divide the rms voltage by the impedance to calculate the rms current.
How do you find the current in an AC circuit?
In a simple circuit, the current is found by dividing the voltage by the resistance. An ac current is calculated using the peak current (determined by dividing the peak voltage by the resistance), the angular frequency, and the time.
How to calculate the RMS voltage of an element?
Calculate the rms voltage across each element by multiplying the reactance or resistance of each element by the rms current. To calculate the rms current, divide the rms voltage by the impedance, given by equation 24 -16.
What happens to alternating current in an inductor circuit?
To show what happens with alternating current, let’s analyze a simple inductor circuit: Pure inductive circuit: Inductor current lags inductor voltage by 90°. If we were to plot the current and voltage for this very simple circuit, it would look something like this: Pure inductive circuit, waveforms.
How is mutual inductance illustrated in a circuit?
Mutual inductance is illustrated by. A change in the current I1 in one device, coil 1 in the figure, induces an emf2 in the other. We express this in equation form as emf2 =−MΔI1 Δt emf 2 = − M Δ I 1 Δ t. M is the same for the reverse process. Self-inductance is the effect of Faraday’s law of induction of a device on itself.
How is the reactance of an inductive circuit equal to the voltage?
Alternating current in a simple inductive circuit is equal to the voltage (in volts) divided by the inductive reactance (in ohms), just as either alternating or direct current in a simple resistive circuit is equal to the voltage (in volts) divided by the resistance (in ohms).