Question

explain the ohms law

Answer 1

Hi !

Know the terms :

Current(I) - Amount of charge flowing through a conductor in unit time. SI Unit - Ampere(A)

Potential difference(V) - Work done to move a unit charge(Q) from one point to another. SI Unit - Volt(V)

Directly proportional - If two quantities are said to be directly proportional , it means that , as one quantity increases,the other also increases that many times. It is represented by ∝

Inversely proportional - If two quantities are said to be inversely proportional , it means that , as one quantity increases,the other decreases

Resistance - Resistance means opposition, hence , in physics , resistance of a substance means the ability of the substance to oppose the flow of current through it.
Different kind of substance have different resistances. The substances which offer low resistance( that allow the flow of current through them more easily) are conductors , and those which have high resistance are insulators or bad conductors.
=>SI Unit of resistance is ohm. (Ω - omega (greek letter))
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According to Ohm's law ,
In a current carrying conductor, the potential difference across the ends of the conducting wire is directly proportional to the current flowing through it , provided that the temperature remains constant.

Potential difference ∝ Current

V ∝ I

V = IR , where R is the constant of proportionality .

R = Resistance


I = V/R

R = V/I


Therefore ,

Current is inversely proportional to Resistance.

Answer 2

Answer:

Explanation:

Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Formula :

Voltage= Current× Resistance

V= I×R

V= voltage, I= current and R= resistance .

The SI unit of resistance is ohms and is denoted by Ω