Ohm's law put in easy?

Question

ok so i have to reasearch ohms law for homework. (just find out basically what it is) but the problem is that i honestly have NO IDEA.

all the websites ive been to are way too complicated. From class I know that its some sort of rule, about the flow of current through two points, and something about a resistor, and something about potential difference.... what is potential difference?

just someone give me a little intro to ohms law thats quite simple so i can try understand, I also need to know what potential differnece is?

please dont say things like 'im not going to do ur homework for you' or 'go ask your teacher' im just asking for some help.

Thankis for reading.

Answer 1

First you need to understand what is electric potential difference.



Hopefully I do no go deep into the topic but I will try making it simple



let say there is water in two tumblers one is higher than the other, and when connected with a pipe it flows from high tumbler to low tumbler,



similarly in a wire when there is electric potential difference,,, current flows from high side to low side.



Ohm's law states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them.[1]

V= I/R

The mathematical equation that describes this relationship is:[2]



r is resistance of wire or conductor,,, every wire opposes this opposing force.



where V is the potential difference measured across the resistance in units of volts; I is the current through the resistance in units of amperes and R is the resistance of the conductor in units of ohms.

Answer 2

I assume you are aware of Newton's laws because I am going to draw analogies between mechanical and electrical system.



According to Newton's second law, when an external force is applied on an object which is not restrained, then the object moves with an acceleration directly proportional to the force applied. This happens with mechanical systems.



In electrical systems, think of potential difference as a driving force which gives electrons the energy to move around in a conductor. The electrons move only between the points between which the potential difference is applied. The direction of stream of electrons is called direction of electronic current, though the conventional current is in direction opposite to the electronic current.



Now, "Ohm law states with all external conditions remaining constant, the current flowing in a conductor is directly proportional to the potential difference across the two ends of the conductor" i.e. if the driving force (potential difference) is greater, then it will result in more number of electrons moving, hence higher current or vice-versa.



Again, all of the potential difference does not give arise to the current. Some of the energy is used up in overcoming the resistance to the flow of electrons which depends upon the material structure. This resistance is the physical quantity called Resistance which forms the proportionality constant.



Thus, we have V = I * R

Answer 3

Electrostatic Potential:

it is simply called electric potential. to understand let's consider raising a metal box from the floor upto a certain height. as we raise it its potential energy increases. and when we let go of it. it moves down. and its potential energy decreases. so we can say that the box moves from a point of higher potential to a point of lower potential.

the same thing is with charges. when a positive charge is put in an electric field. (the area around a charge in which its effect can be felt is known as electric field of that charge). the charge moves along the direction of electric field. but if we make the charge move in the opposite direction then a force has to applied on it, and some has to be done on it. the work done on charge while moving it in the opposite direction is stored in it as electrostatic potential. now if you let go of the charge it will move from a higher potential point to a lower potential point. the difference between those two points is the potential difference.

Ohm' law:

now you know the potential difference ( at least I hope so :-)..)

so when you apply this potential difference across a conductor. the current will start to flow. the symbol for current is "I". and if the value of potential difference V is altered, the value of current also alters. "

""they are in direct proportion with each other, if temperature and resistance are constant""

this statement is known as Ohm's law. according to it.

current is directly proportional to potential difference.

so equation becomes

V=IR

where I is current

V is potential difference

and R is resistance.

(resistance is the obstacle in the flow of charge)

Answer 4

V=I*R the version of potentials = electric powered contemporary * resistance i'm unsure that i exploit the stunning english words or many times taking place english notation, as english not my first language, yet that's the Ohm's regulation. Dimensions could be Volt = A*Ohm