Recent content by karthicknar

A capacitor will not consume power (product of voltage and current) instead it stores energy in electrostatic form. If a capacitor is directly connected to a voltage source, it is charged up instantaneously (assuming ideal voltage source and capacitor). The current flow will be a spike at t=0...

I can only tell the uses of Laplace/Fourier transform which I know. There may be plenty too which I don't know. But there can't be an answer if you ask "purpose" of those transforms. It depends on people who use it for the given application. In general any transform if used will represent the...

No it won't be added to Thevenin resistance, because that resistance will be called as load resistance and has to be removed (not considered) while calculating Rth. In a physical sense it implies the power transfer capability of the source Vth to the load at terminal AB. The more the value of...

As mentioned here it is impossible to see an individual fundamental circuit element in practice. Yet we have to make some assumptions to model the system for analysis. If I have to model an electric heater, it is obviously not wrong to neglect its inductance and capacitance. The central...

I feel that the current direction shown is with respect to the voltage source positive terminal and not through node 1. In this way, the solution given in the book may be correct. Any ways, your way of thinking and your solutions are also correct.

The term "fundamental" itself expresses the meaning that it is unique and not be subdivided into other simple elements. Resistor, capacitor and inductor are fundamental circuit elements, while transistor is not, because a transistor can be modeled/visualized in terms of the fundamental elements...

In line 6, you have to get frequency as second output like this, [Y, freq]=spectrum(y,FFTsize) Now in line 14, if you plot this freq instead of Freq you will get the desired spectrum.

As mentioned in this post lightning is just discharge of charges due to electrical breakdown of dielectric material (air) between them. But the flow of current is unidirectional even though it is in the form of a pulse. So it seems for me to say more logical that the lightning discharge is...

Basically Engineering and Technology are different, they are not same. Engineering stands for application of scientific knowledge to solve real world problems. For example you are doing engineering when you apply Faraday's law of electromagnetism in building an electric motor. Technology...

for the first question, you should keep in mind that in EE we always write as below v(t)=2*sin(2*pi*f1*t)+2*sin(2*pi*f2*t)+4sin(2*pi*f3*t) Match this with the given equations and find f1, f2 and f3. for second question, you have to use Fleming's left hand rule. The figure represents motor...