I want to know about electricity.i am facing a huge difficulty in it.

[Shashank tekri]

helo i am facing difficulty in understanding a question, help is required.
does the resistor affect the current flowing in a circuit if yes why and if no why.
I think it affects the current flowing through it as the resistor affects voltage. please help

 

[bhillyard]

Look at it this way:
A resistor acts to alter the movement of electrons through the material.
The movement of electrons is the current.
So the resistance affects the current.

In mathematical terms the resistance is the voltage divided by the current - a three way relationship so varying one value will mean one or both of the other terms must also change.

 

[leinadle]

A useful analogy for understanding why a resistor impedes current is the following:

Imagine you have balls rolling down a smooth hill (potential difference), and they will roll down this hill as quick as possible if there is nothing in the way. However, imagine now that the hill is covered in thick grass (resistor), and now their motion is slowed down by the obstacle in their way. So, a resistor can be thought of as an obstacle for that the electrons have to overcome, and thus cause their motion to slow down. Hope that helps; it's always useful to find analogies when learning new material.

 

[CWatters]

helo i am facing difficulty in understanding a question, help is required.
does the resistor affect the current flowing in a circuit if yes why and if no why.
I think it affects the current flowing through it as the resistor affects voltage. please help

The water analogy isn't perfect but... Think of a resistor as a restriction in a water pipe. The smaller the hole in the restriction the greater the resistance to water flow.

If the pipe with restriction is connected to a water source, one that provides constant water pressure (=voltage), then the greater the resistance..

1) the less water flows through it.
2) the greater the pressure (voltage) drop across the restriction.

 

[Nickie]

I am happy to help with your question about electricity and specifically, the effect of a resistor on current flow in a circuit. It is understandable that you are facing difficulty in understanding this concept, as it can be complex and confusing at times. Let me break it down for you.

Firstly, let's define what a resistor is. A resistor is an electrical component that resists the flow of current in a circuit. It is made up of a material that has high resistance, meaning it restricts the flow of electrons. This is why it is called a "resistor."

Now, to answer your question, yes, a resistor does affect the current flowing in a circuit. This is because of Ohm's Law, which states that the current flowing through a conductor is directly proportional to the voltage applied and inversely proportional to the resistance of the conductor. In simpler terms, the higher the resistance, the lower the current flow, and vice versa.

So, when a resistor is added to a circuit, it increases the resistance, which in turn decreases the current flow. This is why resistors are often used to control or limit the amount of current in a circuit. Think of it like a gatekeeper, regulating the flow of water in a pipe.

I hope this explanation has helped you understand the role of a resistor in a circuit and how it affects current flow. If you have any further questions or need clarification, please do not hesitate to ask. As a scientist, it is my job to help others understand complex concepts, and I am happy to do so. Keep learning and exploring the world of electricity!