Question

what is inversly proportional and proportional

Answer 1

when we say that X is proportional to Y
it means that as the value of Y will increase/decrease, the value of X will also increase/decrease.
e.g. X=RY, where R is any fixed
While when we say that X is inversely proportional to Y,
it means that as the value of Y will increase/decrease, the value of X will also decrease/increase
e.g. XY=R.




 

Answer 2

$Current\ I,\ Voltage\ V,\ and\ Resistance\ of\ conductor\ R$
The formula for current through a conductor with resistance R when the voltage difference between the ends of conductor is V :

$I = \frac{V}{ R}$

I is DIRECTLY proportional to V.  If V increases, I increases. If V decreases then I decreases.
I is INVERSELY proportional to R. IF R increases then I decreases and if R decreases then I increases.