Hi i got this question ?
have to find Vr and VL
so can i use this formula :
VR = IR
VL = I * XL???
confuse ?? need help ??
am i on right track?
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Impedance is used for AC circuits, when the current and voltage have sinusoidal time dependence. Here the time dependence of the current is different from a sine function. Go back to the definition of the voltage across a capacitor (in terms of charge) and inductor (in terms of derivative of current).
You sent the plot of voltage across the resistor. The shape is correct, but watch out the magnitude. The current is given in A (ampers) The resistance is 2Ω. What is the maximum voltage across the resistor?
What about the inductor?
Got it right?
so answer is 0.002 * (20/1) = 0.04 for Vl
I agree with you. If the graph is current against time then this is the voltage across the inductor for the first part of the graph AND the last part of the graph. This voltage will be constant over these time intervals.
For the middle part it will be -0.04V.
For the flat bits of the graph there is no change of current with time....what will the voltage across the inductor be ??