Linked Questions

5
votes
6answers
4k views

What is the cause of voltage drop across a resistor? [duplicate]

We always assign a voltage drop to a resistor when a current goes through it in a closed circuit. I was wondering if this voltage drop is due to dissipated heat from the resistor or is there another ...
1
vote
5answers
17k views

Why does a resistor reduce voltage if V=IR? [duplicate]

I'm sure this is a very simple question, but I have been confused about this topic for a while now. According to Ohm's law, resistance varies directly with voltage. This means that if resistance ...
0
votes
1answer
1k views

Do resistors limit voltage, or reduce it? [duplicate]

I have been very confused with resistors because I have not found a great, although simple explanation about if resistors reduce or limit voltage. Also, I want a explinaton on why you subtract Vf from ...
-2
votes
1answer
419 views

Actual voltage concept [duplicate]

I just want to know what voltage actually is. I seem to have misunderstandings about this; is it energy of electrons? I just want to know what actually is voltage? And secondly I'm confused about ...
0
votes
1answer
337 views

If V=IR Why are voltage and current interchangeable through a constant resistance [duplicate]

I hear people say things like "I only put 5 amps through the circuit but I put a bunch of volts". I don't understand how this is possible if V=IR. Lets say you have a circuit with 5 ohms of ...
1
vote
2answers
135 views

How does Current relate to Voltage in their behavior in our physical world [duplicate]

I'm really an electrical noob who tries to understand voltage, current and resistance. I know the formulas and can somehow come up with basic explanations about the physics of electricity. However, ...
0
votes
1answer
90 views

How resistors really works? [duplicate]

From what I've readed, a resistor is a component which limit the current in a circuit. Supposing that I've a load that is rated for 12v 500mA, if I put a resistor to limit the current to, for example, ...
-2
votes
4answers
3k views

Can a resistor start a fire?

I read that if you create a short-circuit, this produces heat and can cause a fire or damage an electronic component. The solution is to use a resistor. The heat generated by electricity is ...
0
votes
2answers
490 views

Voltage vs current vs resistance - did I understand them right?

I'm currently getting started to learn about electrical engineering, and I'm having some difficulty separating voltage from current. I have seen a couple of times that a battery is compared to two ...
-1
votes
1answer
233 views

I don't quite understand how voltage and current work. Please help [closed]

So I've been reading a book about electrical engineering and I still don't understand this: In a series circuit, the current stays the same, right? But when there is a resistor, it resists the current ...
0
votes
5answers
259 views

Volts and amperes explained

I'm trying to understand electricity better, but all I found was those stupid water pipe analogies. Can you explain it to me in terms of actual electricity? What is voltage, the speed of the electrons ...
0
votes
2answers
182 views

How correct is my understanding of basic electricity?

I have a very basic way of understanding things. Sometimes I over-complicate and sometimes i make it way too simple so I am hoping someone can help me judge my understanding of basic electricity. I am ...
-4
votes
2answers
117 views

How is amperage “soaked” out of the outlett?

I have some struggles understanding how amperage works. What I understand so far is that amps are the amount of electrons which get pushed by the voltage. But if I have an outlet with 230V~ which is ...
-1
votes
3answers
88 views

How to modify the current of a battery both higher and lower [closed]

From what I've come to understand, a higher voltage source leads to a higher current from source to the destination. Example: On a 1.5V battery let's say I'm getting 50mA load from my device rated ...
0
votes
3answers
157 views

What exactly IS voltage and its difference to other measurements of electricity? [duplicate]

I apologize if this is a stupid question, but I cannot find any answers online, so I feel I must ask here. I do not quite understand exactly what voltage is. I see on batteries, "X Volts", but I do ...