# Tagged Questions

111 views

### Does current source affect flow of current in circuit with a variable resistor?

Suppose you have a current source in series with a resistor R the current through the R resistor would be the current generated by the current source. How would the current through the circuit change ...
114 views

### Need help interpreting a basic circuit question

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: ...
107 views

### Use of current division

"Calculate V (across the current source) and the current flowing down through R1." simulate this circuit – Schematic created using CircuitLab Does the voltage source also produce current, ...
478 views

### electric chewing gum prank circuit diagram

I'm new to electronics. I'm trying to find out how this works out of curiosity. http://www.amazon.com/gp/aw/d/B0050UNNQS Does anyone have a circuit diagram for the circuit? Is the current safe for ...
65 views

### Small-signal input and output resistances of the circuit

I am given this circuit: And I am trying to determine the small-signal input and output resistances. I was either given or found all the following info for the circuit: VA = 110V β = 115 T = ...
249 views

### connection from an comparator to an optocoupler

I have the circuit below to decode a signal that is defined as Logic high >9.5 V and Logic low <6 V To determine the ...
169 views

### Problems when sharing a battery between motors and radio in an RC car

Background I am building an RC Car that I am trying to modify to control from an Android phone. When I connect the remote control module as well as the car circuitry (servo & motor) to separate ...
133 views

### How input current affects circuit? Is it ignored?

All the examples I have seen so far, take the input voltage as-is and start calculating circuit current depending on on-board resistors using ohm's law etc. Can you just ignore the original current ...
165 views

### Current amplifier concept in solar panel [closed]

Whether the output of the solar panel is given to a current amplifier to increase the ampere rating? So that we can increase the ampere hour rating of the battery which will be connected to the solar ...
631 views

### What is meant by relative voltage?

Suppose you have a circuit ,you are told that the voltage at point 2 relative to point 1 is -90V, the voltage across R2 is -30V and V0 is 200V. What is the meaning of voltage at 2 relative to 1? ...
211 views

### What's passive about the passive sign convetion?

I've heard and read about the passive sign convention, but don't really understand its meaning and importance in solving electric circuits. Is this because of conventional current which flows ...
1k views

### Calculate how much current is a microcontroller's pin drawing

I am reading up on microcontrollers and I want to know the current that RA0 is drawing when the switch is open but I think I'am getting it wrong. Also my electronics knowledge is elementary at best. ...