Question

in which kind of materials we observe the ratio of V and I not mainted in constant ?why?​

Answer 1

Explanation:

in case of thermistors...pn junction diode...discharge tubes...v, i ratio is not constant...becausr of atomic arrangement

Answer 2

Answer:

flux is proportional to the ratio v/f in an induction motor . so it has been maintained constant to keep flux constant as all iron parts are designed for a particular flux density..

in case v/f becomes low there will be underflux situation . And The rated torque will not be achieved...

in case it becomes high , overfluxing will occur and Mein saturate the iron parts ..

i hope it helps you..