# Questions tagged [electric-circuits]

An electronic system, with closed loop current flow, and relative electrical potentials present across electrical components.

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### State excitation table using T flipflop of a sequence detector circuit which gives an output when it detects the sequence 0101?

State excitation table using T flipflop of a sequence detector circuit which gives an output when it detects the sequence 0101? Overlapping sequence are accepted
51 views

### How to apply Kirchhoff's rules in a circuit with Voltmeter? [closed]

I was trying to apply Kirchhoff's rules to find out the reading that will be shown by voltmeter. But then, I realized that the current coming out of the voltmeter arm will be zero (assuming infinite ...
22 views

### Why doesn't energy supply rate equal the dissipation rate for electrical energy transmissions?

I was recently reading an example which showed that the average rate of energy dissipation due to resistance of the wires that are used in the transmission of electricity from a generator is not equal ...
11 views

### How to calculate equivalent resistance using Circuitlab [closed]

I'm a beginner at Circuit lab and i tried to calculate the equivalent resistance between node 1 and node 2 but didn't know how so if there's anyone here who's familiar with using Circuit lab i really ...
22 views

### Complex Resistance Circuit Problem.. Finding Equivalent Resistance [closed]

I have a doubt regarding this q. how should I approach this q, I want to calculate equivalent resistance.
36 views

### Applying KVL to a circuit with only a battery and a capacitor

My textbook states that KVL can be applied to a circuit with only a battery and a charging capacitor. According to the textbook then, the voltage across a capacitor always equals that of the battery. ...
32 views

### Why charges don't lose potential in a resistance free loop?

If a battery to a current was like the gravity to a massive object, so the potential rise in the battery is like lifting the massive object above earth's surface, so when charges get closer to the ...
30 views

### How does the electromagnetic field behave in a complex circuit when first energized? Such as in a computer CPU booting up

From what I understand in the case of a simple circuit, the electrons in the circuit wiring are steadily excited, i.e. energized, in a fairly complex way by the external energy input, as the energy ...
1 vote
65 views

### What causes the behavior of the increasing transient current in a circuit with an ohmic resistor?

Why does the current increase from zero to its steady state value in a circuit with a battery and an ohmic resistor, as opposed to initially reaching a very high value and then decaying down to the ...
20 views

### How to properly wire a power supply to a remote control [closed]

I have a remote control for an RC helicopter that I want to hook up to a power supply. Each battery takes 1.5V and I need 6 total. The power supply has a positive and negative terminal. I'm not very ...
45 views

### Imaginary numbers in AC circuits

I've heard/read multiple times that "the use of imaginary numbers in ac circuits simplyfy calculations". My questions is: how is the calculations simplified? (exaple calculations?) And what ...
1 vote
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### Deriving an lumped element LC circuit as the limit of a resonant cavity mode

In principle, an LC circuit is just a degenerate limit of an electromagnetic cavity, where the frequency $\omega_0$ of the resonant mode is much lower than the inverse size of the cavity. As a result, ...
86 views

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### Voltage across points when going in reverse direction across cell

When charging a rechargeable cell, an external power source pushes a current from the (+) to the (-) terminal of the cell. Consider a cell of emf $3$ V and internal resistance $0.80 \Omega$ that's ...
62 views

### Does current flow inside a battery?

When connected in a circuit, does current flow inside a battery. If yes, in which direction?