# Questions tagged [calculus]

Anything related to (differential and integral) calculus, i.e. the branch of mathematics concerned with the manipulations of infinitesimally small quantities. Concepts from calculus are often used in engineering to build more complex and accurate models of physical systems than those which can be built using basic algebra alone.

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### Capacitor constant power charge, constant current discharge curve

I have an (ideal) capacitor that is simultaneously being charged through a DC/DC boost converter (assumed constant power $P_{in}$) and discharged through a linear regulator (assumed constant current ...
127 views

### How to calculate kWh from amps

I'm getting measurements from an IoT device. This measurements are in amps (I get one every 2 min or so). I know the voltage of the device. From what I've seen online I can calculate the power in ...
90 views

### How to find mean value of square signal

I have a comparator circuit and I need to find the mean value of the output square wave. I have calculated it like this: $Vmean=1/T*integral(U*dt)$ from 0 to T and I got $Vmean=-0.7896V$ Can ...
207 views

### How to express a function in terms of singularity functions?

This is the question from the domain of the operational calculus related to circuit analysis. Here is the graph of the sawtooth function: It is asked to represent this function as a combination of ...
46 views

### Calculate U(t) when capacitor C1 charges C2 via a resistor R

simulate this circuit – Schematic created using CircuitLab The switch SW1 is activated at t=10s and charge from C1 is transferred to C2. The power supply charges continuously with 1kV 1mA. How ...
1k views

### Capacitor sizing for known current load

Apologies in advance for the long question, but I've hit a dead end trying to work through an interesting capacitor sizing problem. I'm hoping someone here can help. Problem Description I have a ...
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### Voltage calculation for the schematic [closed]

I would like to know how to calculate the output voltage for the following schematic. I would also like to see the calculations step by step. Right now I am not able to do this, I'm kind of new in ...
1k views

### Heating time of an aluminum plate

I'm designing a circuit for my 3D printer's aluminium heating plate (200x200 mm) and I wanted to be sure before buying resistors. Also, I'm using a Sanguinololu 1.3a. I want it to heat at 120° fast. ...
In my Nilsson "Electric Circuits, 5th ed" book, there's this drill exercise near the beginning of the book. Here it is: Current at the terminals of the element is t<0: $$i=0$$ t>=0: ...